A firm offers routine physical examinations

A Firm Offers Routine Physical Examinations As Part Of A Health Service Program For Its Employees.

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?

.50

.20

.25

1.00

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

1.16

.36

.0324

.424

18

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

A pie chart can be used to summarize the data.

The number of classes is equal to the number of variables plus 2.

The “5 to the k rule” can be applied.

The upper and lower class limits must be calculated.

19

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

n – k - 1

n + k

n + 1

k -1

20

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

halo effects

leniency effects

primacy effects

recency effects

21

The question, "Should products be withdrawn if even one death is associated with its prescribed use, even if no fault for the tampered product accrues to the manufacturer?"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

unresearchable question

ill-defined problem

strip data mining issue

favored-technique problem

23

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

not related

curvilinear

linear

related

24

A ranking scale is a scale that _____.

scores an object by making a comparison and determining order among two or more objects

scores an object without making a direct comparison to another object

groups participants

groups concepts according to specific criteri

25

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

0

4

26

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?

2.00

-0.90

1.00

1.68

12

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

Voice recognition

Field editing

28

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?

number of contacts

sales managers

amount of sales dollars

salesperson

30

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

multicollinearity

homoscedasticity

curvilinearity

autocorrelation

29

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

Encourage each participant to provide accurate responses

Encourage participants to end the survey when they feel they have contributed enough information

Encourage participants to answer only those questions they are comfortable answering

Encourage participants to be succinct in their responses

13

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

percents and proportions

amounts

percents

proportions

1. Age and Size of Cash Offer – A consumer organization studied the effect of age on the size of cash offer given to a person selling a used car. The study involved a total of 36 people, 12 in each of three age groups (young, middle, and elderly) who acted as the owner of a used car. The same medium price, 6-yr-old car was taken to 36 different dealers and a cash offer was solicited for the car. Randomization was used in assigning the owner to the dealer. The amount of the cash offer was recorded in $100s, so the first observation in the table below was an offer of $2300. Note that one of the elderly subjects decided not to participate at the last minute, so the sample sizes were 12, 12, and 11 respectively. SPSS was used to provide some descriptive statistics.

a.

a. An ANOVA was conducted to test that the null hypotheses of equality of the population mean amount of cash for the three age populations, namely, H0: μ1= μ2 = μ3 at the 5% level. The ANOVA table below provides the sum of squares for between-groups, the sum of squares for error (within-groups), and the sum of squares for total. The sum of squares between the groups is given by ≈ 310.2. Show the details for how this sum of squares was found (just substitute the values into all three terms that were summed to obtain this ≈ 310.2 value). (1

pts)

b.

B. Is the following statement true or false? The formula for the calculation of the MSE = 2.562 is an extension of the formula we used for the pooled variance estimate when conducting the two independent samples pooled t-test, namely sp2 = [(n1 – 1)s12 + (n2 – 1)s22] / (n1 + n2 – 2).

i. True

ii. False

c. To conduct an ANOVA, we must assume that the model for the response (amount of cash offer) for each of the three populations is normal with possibly different population means but equal population standard deviations. Which of the following is the best estimate of that common population standard deviation?

i. 155.097

ii. 2.562

iii. 3.3962

iv. 1.6006

d. Report the test statistic value and corresponding p-value.

e. Which of the following is the distribution that SPSS used to calculate the p-value?

i. N(0,1) distribution

ii. t distribution with 32 degrees of freedom

iii. F distribution with 2 and 32 degrees of freedom

f. At this point in the analysis, which of the following is the appropriate conclusion (using a 0.05 level of significance)?

i. There does not appear to be any difference between the population mean cash offers between the three age populations.

ii. It appears that at least one population mean cash offer is different for the three age populations.