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QNT 561 Final Exam 30 Questions and Answers

7 Feb 2017

QNT 561 Final Exam 30 Questions and Answers of University of Phoenix Online Course Applied Business Research & Statistics - qnt561

 

QNT 561 Final Exam or QNT 561 week 6 Final Exam is the last week final exam of University of Phoenix Online course Applied Business Research & Statistics – qnt561. This graduate level course has duration of 6 week. Student can take this course independently or as a part of their graduation degree completion.

Students can learn statics and probability concepts used in business decisions in this course.

Collect here the Questions for the QNT 561 Final Exam or QNT 561 week 6 Final Examination provided by the ace educational website Transwebetutors with the answers for free.

 

1. A random sample of size 15 is selected from a normal population. The population standard deviation is unknown. Assume the null hypothesis indicates a two-tailed test and the researcher decided to use the 0.10 significance level. For what values of t will the null hypothesis not be rejected?

  1. To the left of -1.645 or to the right of 1.645
  2. To the left of -1.345 or to the right of 1.345
  3. Between -1.761 and 1.761
  4. To the left of -1.282 or to the right of 1.282

 

2. Which of the following is a characteristic of the F distribution?

  1. Normally distributed
  2. Negatively skewed
  3. Equal to the t-distribution
  4. Positively skewed

 

3. For a chi-square test involving a contingency table, suppose the null hypothesis is rejected. We conclude that the two variables are __________.

  1. related
  2. curvilinear
  3. linear
  4. not related

 

4. A sales manager for an advertising agency believes that there is a relationship between the number of contacts that a salesperson makes and the amount of sales dollars earned. What is the dependent variable?

  1. sales managers
  2. amount of sales dollars
  3. salesperson
  4. number of contacts

 

5. Which of the following is most appropriately displayed with a frequency table?

  1. What percentage of people prefer Hunt's brand ketchup
  2. The home location of the most valuable customers
  3. How much explanatory value comes from the study's variables
  4. The relationship between gender and job performance

 

6. The manager of Paul's fruit and vegetable store is considering the purchase of a new seedless watermelon from a wholesale distributor. Since this seedless watermelon costs $4, will sell for $7, and is highly perishable, he only expects to sell between six and nine of them. What is the opportunity loss for purchasing nine watermelons when the demand is for seven watermelons?

  1. 8
  2. 4
  3. 12
  4. 0

 

7. A firm offers routine physical examinations as part of a health service program for its employees. The exams showed that 8% of the employees needed corrective shoes, 15% needed major dental work, and 3% needed both corrective shoes and major dental work. What is the probability that an employee selected at random will need either corrective shoes or major dental work?

  1. .25
  2. 1.00
  3. .50
  4. .20

 

8. When data is collected using a qualitative, nominal variable, what is true about a frequency distribution that summarizes the data?

  1. The upper and lower class limits must be calculated.
  2. The number of classes is equal to the number of variables plus 2.
  3. The “5 to the k rule” can be applied.
  4. A pie chart can be used to summarize the data.

 

9. If an ANOVA test is conducted and the null hypothesis is rejected, what does this indicate?

  1. The p-value is less than a.
  2. All population means are different.
  3. At least one pair of population means is different.
  4. The population means are equal.

 

10. A random sample of 20 items is selected from a population. When computing a confidence interval for the population mean, what number of degrees of freedom should be used to determine the appropriate t-value?

  1. 25
  2. 21
  3. 19
  4. 20

 

11. The question, "Should products be withdrawn if even one death is associated with its prescribed use, even if no fault for the tampered product accrues to the manufacturer?" is an example of a(n) _____.

  1. strip data mining issue
  2. unresearchable question
  3. ill-defined problem
  4. favored-technique problem

 

12. A large department store examined a sample of the 18 credit card sales and recorded the amounts charged for each of three types of credit cards: MasterCard, Visa, and Discover. Six MasterCard sales, seven Visa, and five Discover sales were recorded. The store used an ANOVA to test if the mean sales for each credit card were equal. What are the degrees of freedom for the F statistic?

  1. 2 in the numerator, 15 in the denominator
  2. 6 in the numerator, 15 in the denominator
  3. 18 in the numerator, 3 in the denominator
  4. 3 in the numerator, 18 in the denominator

 

13. A linear trend equation is used to represent time series values when the data are changing by equal what?

  1. amounts
  2. percents and proportions
  3. proportions
  4. percents

 

14. Which of the following goals should a good survey instrument accomplish?

  1. Encourage each participant to provide accurate responses
  2. Encourage participants to be succinct in their responses
  3. Encourage participants to answer only those questions they are comfortable answering
  4. Encourage participants to end the survey when they feel they have contributed enough information

 

15. Kroger, a grocery store chain, wants to identify the ideal store layout for increasing store sales. Because it primarily uses two store designs, one a grid layout with vertical aisles divided by a center aisle and another using a traditional straight-aisle pattern, Kroger will match pairs of stores that have different designs but similar shopper demographics and location. Sales from each pair will then be compared to determine if store design is related to sales. Which type of study is this an example of?

  1. Exploratory study
  2. Case study
  3. Ex post facto study
  4. Longitudinal study

 

16. Bones Brothers & Associates prepare individual tax returns. Over prior years, Bones Brothers has maintained careful records regarding the time to prepare a return. The mean time to prepare a return is 90 minutes and the standard deviation of this distribution is 14 minutes. Suppose 100 returns from this year are selected and analyzed regarding the preparation time. What assumption do you need to make about the shape of the population distribution of all possible tax preparation times to make inferences about the mean time to complete a tax form?

  1. The population distribution is skewed to the left.
  2. The population distribution is skewed to the right.
  3. The shape of the population distribution does not matter.
  4. The population distribution is normal.

 

17. Checklists with several items to be considered by respondents may be subject to _____.

  1. recency effects
  2. leniency effects
  3. halo effects
  4. primacy effects

 

18. In a multiple rating list scale, ____.

  1. participants rate multiple items on a 3-point scale
  2. the participant is restricted to circling their rating
  3. it is possible to visualize the results better than with other numerical scales
  4. the data generated are always ordinal

 

19. As the size of the sample increases, what happens to the shape of the distribution of sample means?

  1. It cannot be predicted in advance
  2. It is positively skewed
  3. It is negatively skewed
  4. It approaches a normal distribution

 

20. For any chi-square goodness-of-fit test, the number of degrees of freedom is found by ______.

  1. n + k
  2. k -1
  3. n – k - 1
  4. n + 1

 

21. BankChoice is concerned about stagnating profits and asks, "How can profitability be improved?" This is an example of a(n) _____.

  1. research question
  2. measurement question
  3. management question
  4. investigative question

 

22. A machine is set to fill the small-size packages of M&M candies with 56 candies per bag. A sample revealed three bags of 56, two bags of 57, one bag of 55, and two bags of 58. To test the hypothesis that the mean candies per bag is 56, how many degrees of freedom are there?

  1. 1
  2. 7
  3. 9
  4. 8

 

23. An experimental study is one that _____.

  1. attempts to reveal why or how one variable produces changes in another
  2. involves manipulation of one or more variables to determine the effect on another variable
  3. attempts to capture a population's characteristics by making inferences from a sample's characteristics and testing resulting hypotheses
  4. discovers answers to the questions who, what, when, where, or how much

 

24. The monthly salaries of a sample of 100 employees were rounded to the nearest $10. They ranged from a low of $1,040 to a high of $1,720. If we want to condense the data into seven classes, what is the most convenient class interval?

  1. $200
  2. $50
  3. $150
  4. $100

 

25. Consider a regression analysis, where the correlation coefficient is 0.18. Then, the coefficient of determination is _______.

  1. .0324
  2. .36
  3. 1.16
  4. .424

 

26. In multiple regression analysis, when the independent variables are highly correlated, this situation is called __________________.

  1. homoscedasticity
  2. curvilinearity
  3. multicollinearity
  4. autocorrelation

 

27. Sam's Club installed self-checkout stations that can track not only member's purchases but also packaging problems, as the system uses universal product codes to match the item the shopper has in their cart with its price and inventory level in the store, generating a spreadsheet style report for the researcher. If you consider the scanner as the tool for collecting data for Sam's researchers, they are doing data entry by ____.

  1. spreadsheet
  2. Optical Character Recognition
  3. Field editing
  4. Voice recognition

 

28. The weekly incomes of a large group of executives are normally distributed with a mean of $2,000 and a standard deviation of $100. What is the z-score for an income of $2,100?

  1. 1.683
  2. 0.90
  3. 2.00
  4. 1.00

 

29. A ranking scale is a scale that _____.

  1. scores an object without making a direct comparison to another object
  2. groups participants
  3. groups concepts according to specific criteria
  4. scores an object by making a comparison and determining order among two or more objects

 

30. What is the interpretation of a 96% confidence level?

  1. The interval contains 96% of all sample means.
  2. Approximately 96 out of 100 such intervals would include the true value of the population parameter.
  3. There's a 96% chance that the given interval includes the true value of the population parameter.
  4. There's a 4% chance that the given interval does not include the true value of the population parameter.

 

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QNT 561 Week 5 Weekly Learning Assessments

2 Apr 2016

 

Chapter 13 Exercise 6

The owner of Maumee Ford-Mercury-Volvo wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at the dealership during the last year.

Car         Age (years)         Selling   Car            Age (years)        Selling Price ($000)

                                                Price ($000)       

1                   9                         8.1                            7                            8                              7.6

2                   7                         6.0                            8                            11                           8.0

3                  11                       3.6                            9                            10                           8.0

4                  12                       4.0                            10                         12                           6.0

5                   8                         5.0                            11                         6                              8.6

6                   7                         10.0                          12                         6                              8.0 

a. If we want to estimate selling price on the basis of the age of the car, which variable is the dependent variable and which is the independent variable?

b-1. Determine the correlation coefficient. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.)

b-2. Determine the coefficient of determination. (Round your answer to 3 decimal places.)

c. Interpret the correlation coefficient. Does it surprise you that the correlation coefficient is negative? (Round your answer to nearest whole number.)

 

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Chapter 13 Exercise 12

The Student Government Association at Middle Carolina University wanted to demonstrate the relationship between the number of beers a student drinks and his or her blood alcohol content (BAC). A random sample of 18 students participated in a study in which each participating student was randomly assigned a number of 12-ounce cans of beer to drink. Thirty minutes after they consumed their assigned number of beers, a member of the local sheriff’s office measured their blood alcohol content. The sample information is reported below.

 Student               Beers                    BAC                        Student                                Beers                    BAC

1                              6                              0.1                          10                           3                              0.07

2                              7                              0.09                        11                           3                              0.05

3                              7                              0.09                        12                           7                              0.08

4                              4                              0.1                          13                           1                              0.04

5                              5                              0.1                          14                           4                              0.07

6                              3                              0.07                        15                           2                              0.06

7                              3                              0.1                          16                           7                              0.12

8                              6                              0.12                        17                           2                              0.05

9                              6                              0.09                        18                           1                              0.02

Use a statistical software package to answer the following questions.

 

a-1. Choose a scatter diagram that best fits the data.

Picture

Picture

Picture

Picture
b. Fill in the blanks below. (Round your answers to 3 decimal places.)

c. Determine the coefficient of correlation and coefficient of determination. (Round your answers to 3 decimal places.)

c-1.  State the decision rule for .01 significance level: H0: ρ ≤ 0; H1: ρ > 0. (Round your answer to 3 decimal places.)

c-2. Compute the value of the test statistic. (Round your answer to 2 decimal places.)

c-3. What is the p-value? (Hint: use your analysis software) (Round p-value to 4 decimal places.)

c-4.  At the .01 significance level, is it reasonable to conclude that there is a positive relationship in the population between the number of beers consumed and the BAC?

 

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Chapter 13 Exercise 14

The following sample observations were randomly selected.

a. Determine the regression equation. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.)

b. Determine the value of when X is 7. (Round your answer to 3 decimal places.)

 

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Chapter 13 Exercise 22

The owner of Maumee Ford-Mercury-Volvo wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at the dealership during the last year.

Car         Age (years)    Selling Price ($000)               Car         Age (years)         Selling Price ($000)

1                              9                              8.1                          7                             8                              7.6

2                              7                              6                              8                             11                           8

3                              11                           3.6                          9                             10                           8

4                              12                           4                              10                           12                           6

5                              8                              5                              11                           6                              8.6

6                              7                              10                           12                           6                              8  

The regression equation is, the sample size is 12, and the standard error of the slope is 0.23. Use the .05 significance level. Can we conclude that the slope of the regression line is less than zero? 

 

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Chapter 13 Exercise 26

The owner of Maumee Ford-Mercury-Volvo wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at the dealership during the last year.

 

Car         Age (years)         Selling Price ($000)

1                              9                              8.1           

2                              7                              6.0           

3                              11                           3.6           

4                              12                           4.0           

5                              8                              5.0           

6                              7                              10.0         

7                              8                              7.6           

8                              11                           8.0           

9                              10                           8.0           

10                           12                           6.0           

11                           6                              8.6           

12                           6                              8.0           

a. Determine the standard error of estimate. (Round your answer to 3 decimal places.)

b. Determine the coefficient of determination. (Round your answer to 3 decimal places.)

c. Interpret the coefficient of determination. (Round your answer to the nearest whole number.)

 

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Chapter 14 Exercise 2

Thompson Photo Works purchased several new, highly sophisticated processing machines. The production department needed some guidance with respect to qualifications needed by an operator. Is age a factor? Is the length of service as an operator (in years) important? In order to explore further the factors needed to estimate performance on the new processing machines, four variables were listed:

X1 = Length of time an employee was in the industry

X2 = Mechanical aptitude test score

X3 = Prior on-the-job rating

X4 = Age

Performance on the new machine is designated y. 

Thirty employees were selected at random. Data were collected for each, and their performances on the new machines were recorded. A few results are:

                                Performance                     Length of                             Mechanical                         Prior

on New                                                Time in                                 Aptitude                              On-the-Job                                        

Machine,                             Industry,                              Score,                                   Performance,                    Age,

Name                                    Y                                  X1                                        X2                                         X3                                             X4

Mike Miraglia                     112                             12                                       312                                       121                                           52

Sue Trythall                        113                              2                                         380                                         123                                           27 

The equation is:

Ŷ = 11.6 + 0.4X1 + 0.286X2 + 0.112X3 + 0.002X4

a. What is this equation called?

b. How many dependent and independent variables are there?

c. What is the number 0.286 called?

d. As age increases by one year, how much does estimated performance on the new machine increase? (Round your answer to 3 decimal places.)

e. Carl Knox applied for a job at Photo Works. He has been in the business for 6 years and scored 280 on the mechanical aptitude test. Carl’s prior on-the-job performance rating is 97, and he is 35 years old. Estimate Carl’s performance on the new machine. (Round your answer to 3 decimal places.)

 

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Chapter 14 Exercise 6

Consider the ANOVA table that follows.

Analysis of Variance Source                                         DF                           SS                           MS                         F

Regression                                                                          5                              3710                       742                         12.89

Residual Error                                                                    46                           2647.38 57.55                    

Total                                                                                      51                           6357.38

a-1. Determine the standard error of estimate. (Round your answer to 2 decimal places.)

a-2. About 95% of the residuals will be between what two values? (Round your answers to 2 decimal places.)

b-1. Determine the coefficient of multiple determination. (Round your answer to 3 decimal places.)

b-2. Determine the percentage variation for the independent variables. (Round your answer to 1 decimal place. Omit the "%" sign in your response.)

c. Determine the coefficient of multiple determination, adjusted for the degrees of freedom. (Round your answer to 3 decimal places.)

 

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Chapter 14 Exercise 8

The following regression output was obtained from a study of architectural firms. The dependent variable is the total amount of fees in millions of dollars.

 

Predictor             Co eff                    SE Co eff              t                              p-value

Constant              7.987                     2.967                     2.69                        0.01

X1                           0.122                     0.031                     3.92                        0

X2                           –1.120                   0.053                     –2.270                   0.028

X3                           –0.063                   0.039                     –1.610                   0.114

X4                           0.523                     0.142                     3.69                        0.001

X5                           –0.065                   0.04                        –1.620                   0.112    

Analysis of Variance                                                                                                                                                       

Source                                  DF                           SS                           MS                         F                              p-value

Regression                          5                              3710                       742                         12.89                     0             

Residual Error                    46                           2647.38 57.55    

 Total                                     51                           6357.38                                                                                                                                

X1 is the number of architects employed by the company.

X2 is the number of engineers employed by the company.

X3 is the number of years involved with health care projects.

X4 is the number of states in which the firm operates.

X5 is the percent of the firm’s work that is health care–related.

a. Write out the regression equation. (Round your answers to 3 decimal places. Negative answers should be indicated by a minus sign.)

b. How large is the sample? How many independent variables are there?

c-1. State the decision rule for .05 significance level: H0: β1 = β2 = β3 =β4 =β5 =0; H1: Not all β's are 0. (Round your answer to 2 decimal places.)

c-2. Compute the value of the F statistic. (Round your answer to 2 decimal places.)

c-3. Can we conclude that the set of regression coefficients could be different from 0? Use the .05 significance level.

d-1. State the decision rule for .05 significance level. (Round your answers to 3 decimal places.)

d-2. Compute the value of the test statistic. (Round your answers to 2 decimal places. Negative answers should be indicated by a minus sign.)

d-3. Which variable would you consider eliminating?


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QNT 561 Final Exam Question and Answers

17 Dec 2015

 

1. A random sample of size 15 is selected from a normal population. The population standard deviation is unknown. Assume the null hypothesis indicates a two-tailed test and the researcher decided to use the 0.10 significance level. For what values of t will the null hypothesis not be rejected?

  1. To the left of -1.645 or to the right of 1.645
  2. To the left of -1.345 or to the right of 1.345
  3. Between -1.761 and 1.761
  4. To the left of -1.282 or to the right of 1.282

QNT 561 Final Questions and Answers QNT 561 Final Exam

2. Which of the following is a characteristic of the F distribution?

  1. Normally distributed
  2. Negatively skewed
  3. Equal to the t-distribution
  4. Positively skewed

 

3. For a chi-square test involving a contingency table, suppose the null hypothesis is rejected. We conclude that the two variables are __________.

  1. related
  2. curvilinear
  3. linear
  4. not related

University of Phoenix QNT 561 Final Exam Guide QNT 561 Final Exam

4. A sales manager for an advertising agency believes that there is a relationship between the number of contacts that a salesperson makes and the amount of sales dollars earned. What is the dependent variable?

  1. sales managers
  2. amount of sales dollars
  3. salesperson
  4. number of contacts

QNT 561 Final Exam Solution QNT 561 Final Exam (Latest)

5. Which of the following is most appropriately displayed with a frequency table?

  1. What percentage of people prefer Hunt's brand ketchup
  2. The home location of the most valuable customers
  3. How much explanatory value comes from the study's variables
  4. The relationship between gender and job performance

Answers To QNT 561 Final Exam Free Essays QNT 561 Final Exam (Latest)

6. The manager of Paul's fruit and vegetable store is considering the purchase of a new seedless watermelon from a wholesale distributor. Since this seedless watermelon costs $4, will sell for $7, and is highly perishable, he only expects to sell between six and nine of them. What is the opportunity loss for purchasing nine watermelons when the demand is for seven watermelons?

  1. 8
  2. 4
  3. 12
  4. 0

QNT 561 Final Exam Test QNT 561 Final Exam 

7. A firm offers routine physical examinations as part of a health service program for its employees. The exams showed that 8% of the employees needed corrective shoes, 15% needed major dental work, and 3% needed both corrective shoes and major dental work. What is the probability that an employee selected at random will need either corrective shoes or major dental work?

  1. .25
  2. 1.00
  3. .50
  4. .20

 Complete Answers just a click away QNT 561 Final Exam

8. When data is collected using a qualitative, nominal variable, what is true about a frequency distribution that summarizes the data?

  1. The upper and lower class limits must be calculated.
  2. The number of classes is equal to the number of variables plus 2.
  3. The “5 to the k rule” can be applied.
  4. A pie chart can be used to summarize the data.

QNT 561 Complete class QNT 561

9. If an ANOVA test is conducted and the null hypothesis is rejected, what does this indicate?

  1. The p-value is less than a.
  2. All population means are different.
  3. At least one pair of population means is different.
  4. The population means are equal.

10. A random sample of 20 items is selected from a population. When computing a confidence interval for the population mean, what number of degrees of freedom should be used to determine the appropriate t-value?

  1. 25
  2. 21
  3. 19
  4. 20

Click here to download Complete Answers of QNT 561

11. The question, "Should products be withdrawn if even one death is associated with its prescribed use, even if no fault for the tampered product accrues to the manufacturer?" is an example of a(n) _____.

  1. strip data mining issue
  2. unresearchable question
  3. ill-defined problem
  4. favored-technique problem

 

12. A large department store examined a sample of the 18 credit card sales and recorded the amounts charged for each of three types of credit cards: MasterCard, Visa, and Discover. Six MasterCard sales, seven Visa, and five Discover sales were recorded. The store used an ANOVA to test if the mean sales for each credit card were equal. What are the degrees of freedom for the F statistic?

  1. 2 in the numerator, 15 in the denominator
  2. 6 in the numerator, 15 in the denominator
  3. 18 in the numerator, 3 in the denominator
  4. 3 in the numerator, 18 in the denominator

Download Complete Answers of QNT 561 Final Exam (Latest)

13. A linear trend equation is used to represent time series values when the data are changing by equal what?

  1. amounts
  2. percents and proportions
  3. proportions
  4. percents

 

14. Which of the following goals should a good survey instrument accomplish?

  1. Encourage each participant to provide accurate responses
  2. Encourage participants to be succinct in their responses
  3. Encourage participants to answer only those questions they are comfortable answering
  4. Encourage participants to end the survey when they feel they have contributed enough information

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15. Kroger, a grocery store chain, wants to identify the ideal store layout for increasing store sales. Because it primarily uses two store designs, one a grid layout with vertical aisles divided by a center aisle and another using a traditional straight-aisle pattern, Kroger will match pairs of stores that have different designs but similar shopper demographics and location. Sales from each pair will then be compared to determine if store design is related to sales. Which type of study is this an example of?

  1. Exploratory study
  2. Case study
  3. Ex post facto study
  4. Longitudinal study

 

16. Bones Brothers & Associates prepare individual tax returns. Over prior years, Bones Brothers has maintained careful records regarding the time to prepare a return. The mean time to prepare a return is 90 minutes and the standard deviation of this distribution is 14 minutes. Suppose 100 returns from this year are selected and analyzed regarding the preparation time. What assumption do you need to make about the shape of the population distribution of all possible tax preparation times to make inferences about the mean time to complete a tax form?

  1. The population distribution is skewed to the left.
  2. The population distribution is skewed to the right.
  3. The shape of the population distribution does not matter.
  4. The population distribution is normal.

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17. Checklists with several items to be considered by respondents may be subject to _____.

  1. recency effects
  2. leniency effects
  3. halo effects
  4. primacy effects

 

18. In a multiple rating list scale, ____.

  1. participants rate multiple items on a 3-point scale
  2. the participant is restricted to circling their rating
  3. it is possible to visualize the results better than with other numerical scales
  4. the data generated are always ordinal

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19. As the size of the sample increases, what happens to the shape of the distribution of sample means?

  1. It cannot be predicted in advance
  2. It is positively skewed
  3. It is negatively skewed
  4. It approaches a normal distribution

 

20. For any chi-square goodness-of-fit test, the number of degrees of freedom is found by ______.

  1. n + k
  2. k -1
  3. n – k - 1
  4. n + 1

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21. BankChoice is concerned about stagnating profits and asks, "How can profitability be improved?" This is an example of a(n) _____.

  1. research question
  2. measurement question
  3. management question
  4. investigative question

 

22. A machine is set to fill the small-size packages of M&M candies with 56 candies per bag. A sample revealed three bags of 56, two bags of 57, one bag of 55, and two bags of 58. To test the hypothesis that the mean candies per bag is 56, how many degrees of freedom are there?

  1. 1
  2. 7
  3. 9
  4. 8

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23. An experimental study is one that _____.

  1. attempts to reveal why or how one variable produces changes in another
  2. involves manipulation of one or more variables to determine the effect on another variable
  3. attempts to capture a population's characteristics by making inferences from a sample's characteristics and testing resulting hypotheses
  4. discovers answers to the questions who, what, when, where, or how much

 

24. The monthly salaries of a sample of 100 employees were rounded to the nearest $10. They ranged from a low of $1,040 to a high of $1,720. If we want to condense the data into seven classes, what is the most convenient class interval?

  1. $200
  2. $50
  3. $150
  4. $100

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25. Consider a regression analysis, where the correlation coefficient is 0.18. Then, the coefficient of determination is _______.

  1. .0324
  2. .36
  3. 1.16
  4. .424

 

26. In multiple regression analysis, when the independent variables are highly correlated, this situation is called __________________.

  1. homoscedasticity
  2. curvilinearity
  3. multicollinearity
  4. autocorrelation

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27. Sam's Club installed self-checkout stations that can track not only member's purchases but also packaging problems, as the system uses universal product codes to match the item the shopper has in their cart with its price and inventory level in the store, generating a spreadsheet style report for the researcher. If you consider the scanner as the tool for collecting data for Sam's researchers, they are doing data entry by ____.

  1. spreadsheet
  2. Optical Character Recognition
  3. Field editing
  4. Voice recognition

 

28. The weekly incomes of a large group of executives are normally distributed with a mean of $2,000 and a standard deviation of $100. What is the z-score for an income of $2,100?

  1. 1.683
  2. 0.90
  3. 2.00
  4. 1.00

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29. A ranking scale is a scale that _____.

  1. scores an object without making a direct comparison to another object
  2. groups participants
  3. groups concepts according to specific criteria
  4. scores an object by making a comparison and determining order among two or more objects

 

30. What is the interpretation of a 96% confidence level?

  1. The interval contains 96% of all sample means.
  2. Approximately 96 out of 100 such intervals would include the true value of the population parameter.
  3. There's a 96% chance that the given interval includes the true value of the population parameter.
  4. There's a 4% chance that the given interval does not include the true value of the population parameter.

 

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