QNT 561 Final Exam UOP New Course
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<strong>QNT</strong> <strong>561</strong> <strong>Final</strong> <strong>Exam</strong> – Assignment<br />
1. A random sample of size 15 is selected from a normal population. The population standard<br />
deviation is unknown. Assume the null hypothesis indicates a two-tailed test and the<br />
researcher decided to use the 0.10 significance level. For what values of t will the null<br />
hypothesis not be rejected?<br />
a) To the left of -1.645 or to the right of 1.645<br />
b) To the left of -1.345 or to the right of 1.345<br />
c) Between -1.761 and 1.761<br />
d) 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?<br />
a) Normally distributed<br />
b) Negatively skewed<br />
c) Equal to the t-distribution<br />
d) Positively skewed<br />
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3. For a chi-square test involving a contingency table, suppose the null hypothesis is rejected.<br />
We conclude that the two variables are __________.<br />
a) related<br />
b) curvilinear<br />
c) linear<br />
d) not related<br />
4. A sales manager for an advertising agency believes that there is a relationship between the<br />
number of contacts that a salesperson makes and the amount of sales dollars earned. What is<br />
the dependent variable?<br />
a) sales managers<br />
b) amount of sales dollars<br />
c) salesperson<br />
d) number of contacts<br />
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5. Which of the following is most appropriately displayed with a frequency table?<br />
a) What percentage of people prefer Hunt's brand ketchup<br />
b) The home location of the most valuable customers<br />
c) How much explanatory value comes from the study's variables
d) The relationship between gender and job performance<br />
6. The manager of Paul's fruit and vegetable store is considering the purchase of a new<br />
seedless watermelon from a wholesale distributor. Since this seedless watermelon costs $4,<br />
will sell for $7, and is highly perishable, he only expects to sell between six and nine of them.<br />
What is the opportunity loss for purchasing nine watermelons when the demand is for seven<br />
watermelons?<br />
a) 8<br />
b) 4<br />
c) 12<br />
d) 0<br />
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7. A firm offers routine physical examinations as part of a health service program for its<br />
employees. The exams showed that 8% of the employees needed corrective shoes, 15%<br />
needed major dental work, and 3% needed both corrective shoes and major dental work.<br />
What is the probability that an employee selected at random will need either corrective<br />
shoes or major dental work?<br />
a) .25<br />
b) 1.00<br />
c) .50<br />
d) .20<br />
8. When data is collected using a qualitative, nominal variable, what is true about a frequency<br />
distribution that summarizes the data?<br />
a) The upper and lower class limits must be calculated.<br />
b) The number of classes is equal to the number of variables plus 2.<br />
c) The “5 to the k rule” can be applied.<br />
d) A pie chart can be used to summarize the data.<br />
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9. If an ANOVA test is conducted and the null hypothesis is rejected, what does this indicate?<br />
a) The p-value is less than a.<br />
b) All population means are different.<br />
c) At least one pair of population means is different.<br />
d) The population means are equal.<br />
10. A random sample of 20 items is selected from a population. When computing a<br />
confidence interval for the population mean, what number of degrees of freedom should be<br />
used to determine the appropriate t-value?<br />
a) 25<br />
b) 21<br />
c) 19<br />
d) 20<br />
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11. The question, "Should products be withdrawn if even one death is associated with its<br />
prescribed use, even if no fault for the tampered product accrues to the manufacturer?" is an<br />
example of a(n) _____.<br />
a) strip data mining issue<br />
b) unresearchable question<br />
c) ill-defined problem<br />
d) favored-technique problem<br />
12. A large department store examined a sample of the 18 credit card sales and recorded the<br />
amounts charged for each of three types of credit cards: MasterCard, Visa, and Discover. Six<br />
MasterCard sales, seven Visa, and five Discover sales were recorded. The store used an<br />
ANOVA to test if the mean sales for each credit card were equal. What are the degrees of<br />
freedom for the F statistic?<br />
a) 2 in the numerator, 15 in the denominator
) 6 in the numerator, 15 in the denominator<br />
c) 18 in the numerator, 3 in the denominator<br />
d) 3 in the numerator, 18 in the denominator<br />
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13. A linear trend equation is used to represent time series values when the data are<br />
changing by equal what?<br />
a) amounts<br />
b) percent’s and proportions<br />
c) proportions<br />
d) percent’s<br />
14. Which of the following goals should a good survey instrument accomplish?<br />
a) Encourage each participant to provide accurate responses<br />
b) Encourage participants to be succinct in their responses<br />
c) Encourage participants to answer only those questions they are comfortable answering<br />
d) Encourage participants to end the survey when they feel they have contributed enough<br />
information<br />
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15. Kroger, a grocery store chain, wants to identify the ideal store layout for increasing store<br />
sales. Because it primarily uses two store designs, one a grid layout with vertical aisles<br />
divided by a center aisle and another using a traditional straight-aisle pattern, Kroger will<br />
match pairs of stores that have different designs but similar shopper demographics and<br />
location. Sales from each pair will then be compared to determine if store design is related to<br />
sales. Which type of study is this an example of?<br />
a) Exploratory study<br />
b) Case study
c) Ex post facto study<br />
d) Longitudinal study<br />
16. Bones Brothers & Associates prepare individual tax returns. Over prior years, Bones<br />
Brothers has maintained careful records regarding the time to prepare a return. The mean<br />
time to prepare a return is 90 minutes and the standard deviation of this distribution is 14<br />
minutes. Suppose 100 returns from this year are selected and analyzed regarding the<br />
preparation time. What assumption do you need to make about the shape of the population<br />
distribution of all possible tax preparation times to make inferences about the mean time to<br />
complete a tax form?<br />
a) The population distribution is skewed to the left.<br />
b) The population distribution is skewed to the right.<br />
c) The shape of the population distribution does not matter.<br />
d) The population distribution is normal.<br />
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17. Checklists with several items to be considered by respondents may be subject to _____.<br />
a) recency effects<br />
b) leniency effects<br />
c) halo effects<br />
d) primacy effects<br />
18. In a multiple rating list scale, ____.<br />
a) participants rate multiple items on a 3-point scale<br />
b) the participant is restricted to circling their rating<br />
c) it is possible to visualize the results better than with other numerical scales<br />
d) the data generated are always ordinal<br />
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19. As the size of the sample increases, what happens to the shape of the distribution of<br />
sample means?<br />
a) It cannot be predicted in advance<br />
b) It is positively skewed<br />
c) It is negatively skewed<br />
d) It approaches a normal distribution<br />
20. For any chi-square goodness-of-fit test, the number of degrees of freedom is found by<br />
______.<br />
a) n + k<br />
b) k -1<br />
c) n – k - 1<br />
d) n + 1<br />
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21. Bank Choice is concerned about stagnating profits and asks, "How can profitability be<br />
improved?" This is an example of a (n) _____.<br />
a) research question<br />
b) measurement question<br />
c) management question<br />
d) investigative question<br />
22. A machine is set to fill the small-size packages of M&M candies with 56 candies per bag. A<br />
sample revealed three bags of 56, two bags of 57, one bag of 55, and two bags of 58. To test<br />
the hypothesis that the mean candies per bag is 56, how many degrees of freedom are there?<br />
a) 1<br />
b) 7<br />
c) 9
d) 8<br />
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23. An experimental study is one that _____.<br />
a) attempts to reveal why or how one variable produces changes in another<br />
b) involves manipulation of one or more variables to determine the effect on another<br />
variable<br />
c) attempts to capture a population's characteristics by making inferences from a sample's<br />
characteristics and testing resulting hypotheses<br />
d) discovers answers to the questions who, what, when, where, or how much<br />
24. The monthly salaries of a sample of 100 employees were rounded to the nearest $10.<br />
They ranged from a low of $1,040 to a high of $1,720. If we want to condense the data into<br />
seven classes, what is the most convenient class interval?<br />
a) $200<br />
b) $50<br />
c) $150<br />
d) $100<br />
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25. Consider a regression analysis, where the correlation coefficient is 0.18. Then, the<br />
coefficient of determination is _______.<br />
a) .0324<br />
b) .36<br />
c) 1.16<br />
d) .424<br />
26. In multiple regression analysis, when the independent variables are highly correlated, this<br />
situation is called __________________.
a) homoscedasticity<br />
b) curvilinearity<br />
c) multicollinearity<br />
d) autocorrelation<br />
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27. Sam's Club installed self-checkout stations that can track not only member's purchases<br />
but also packaging problems, as the system uses universal product codes to match the item<br />
the shopper has in their cart with its price and inventory level in the store, generating a<br />
spreadsheet style report for the researcher. If you consider the scanner as the tool for<br />
collecting data for Sam's researchers, they are doing data entry by ____.<br />
a) spreadsheet<br />
b) Optical Character Recognition<br />
c) Field editing<br />
d) Voice recognition<br />
28. The weekly incomes of a large group of executives are normally distributed with a mean<br />
of $2,000 and a standard deviation of $100. What is the z-score for an income of $2,100?<br />
a) 1.683<br />
b) 0.90<br />
c) 2.00<br />
d) 1.00<br />
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29. A ranking scale is a scale that _____.<br />
a) scores an object without making a direct comparison to another object<br />
b) groups participants
c) groups concepts according to specific criteria<br />
d) scores an object by making a comparison and determining order among two or more<br />
objects<br />
30. What is the interpretation of a 96% confidence level?<br />
a) The interval contains 96% of all sample means.<br />
b) Approximately 96 out of 100 such intervals would include the true value of the<br />
population parameter.<br />
c) There's a 96% chance that the given interval includes the true value of the population<br />
parameter.<br />
d) There's a 4% chance that the given interval does not include the true value of the<br />
population parameter.<br />
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