QNT 561 Final Exam - Assignment

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- 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? - To the left of -1.645 or to the right of 1.645
- To the left of -1.345 or to the right of 1.345
- Between -1.761 and 1.761
- 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? - Normally distributed
- Negatively skewed
- Equal to the t-distribution
- Positively skewed

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- 3. For a chi-square test involving a contingency

table, suppose the null hypothesis is rejected.

We conclude that the two variables are

__________. - related
- curvilinear
- linear
- 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? - sales managers
- amount of sales dollars
- salesperson
- number of contacts
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- 5. Which of the following is most appropriately

displayed with a frequency table? - What percentage of people prefer Hunt's brand

ketchup - The home location of the most valuable customers
- How much explanatory value comes from the study's

variables - 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? - 8
- 4
- 12
- 0
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- 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? - .25
- 1.00
- .50
- .20
- 8. When data is collected using a qualitative,

nominal variable, what is true about a frequency

distribution that summarizes the data? - The upper and lower class limits must be

calculated. - The number of classes is equal to the number of

variables plus 2. - The 5 to the k rule can be applied.
- A pie chart can be used to summarize the data.
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- 9. If an ANOVA test is conducted and the null

hypothesis is rejected, what does this indicate? - The p-value is less than a.
- All population means are different.
- At least one pair of population means is

different. - 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? - 25
- 21
- 19
- 20
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- 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) _____. - strip data mining issue
- unresearchable question
- ill-defined problem
- 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? - 2 in the numerator, 15 in the denominator
- 6 in the numerator, 15 in the denominator
- 18 in the numerator, 3 in the denominator
- 3 in the numerator, 18 in the denominator
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- 13. A linear trend equation is used to represent

time series values when the data are changing by

equal what? - amounts
- percents and proportions
- proportions
- Percents
- 14. Which of the following goals should a good

survey instrument accomplish? - Encourage each participant to provide accurate

responses - Encourage participants to be succinct in their

responses - Encourage participants to answer only those

questions they are comfortable answering - Encourage participants to end the survey when

they feel they have contributed enough

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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? - Exploratory study
- Case study
- Ex post facto study
- 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? - The population distribution is skewed to the

left. - The population distribution is skewed to the

right. - The shape of the population distribution does not

matter. - The population distribution is normal.

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- 17. Checklists with several items to be

considered by respondents may be subject to

_____. - recency effects
- leniency effects
- halo effects
- primacy effects
- 18. In a multiple rating list scale, ____.
- participants rate multiple items on a 3-point

scale - the participant is restricted to circling their

rating - it is possible to visualize the results better

than with other numerical scales - 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? - It cannot be predicted in advance
- It is positively skewed
- It is negatively skewed
- It approaches a normal distribution
- 20. For any chi-square goodness-of-fit test, the

number of degrees of freedom is found by ______. - n k
- k -1
- n k - 1
- n 1
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- 21. Bank Choice is concerned about stagnating

profits and asks, "How can profitability be

improved?" This is an example of a (n) _____. - research question
- measurement question
- management question
- investigative question
- 22. A machine is set to fill the small-size

packages of MM 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
- 7
- 9
- 8
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- 23. An experimental study is one that _____.
- attempts to reveal why or how one variable

produces changes in another - involves manipulation of one or more variables to

determine the effect on another variable - attempts to capture a population's

characteristics by making inferences from a

sample's characteristics and testing resulting

hypotheses - 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? - 200
- 50
- 150
- 100
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- 25. Consider a regression analysis, where the

correlation coefficient is 0.18. Then, the

coefficient of determination is _______. - .0324
- .36
- 1.16
- .424
- 26. In multiple regression analysis, when the

independent variables are highly correlated, this

situation is called __________________. - homoscedasticity
- curvilinearity
- multicollinearity
- 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 ____. - spreadsheet
- Optical Character Recognition
- Field editing
- 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? - 1.683
- 0.90
- 2.00
- 1.00
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- 29. A ranking scale is a scale that _____.
- scores an object without making a direct

comparison to another object - groups participants
- groups concepts according to specific criteria
- 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? - The interval contains 96 of all sample means.
- Approximately 96 out of 100 such intervals would

include the true value of the population

parameter. - There's a 96 chance that the given interval

includes the true value of the population

parameter. - There's a 4 chance that the given interval does

not include the true value of the population

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