QNT 561 Final Exam Question and Answers
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d) The population means are equal.<br />
10. A r<strong>and</strong>om sample of 20 items is selected from a population. When<br />
computing a confidence interval for the population mean, what<br />
number of degrees of freedom should be used to determine the<br />
appropriate t-value?<br />
a) 25<br />
b) 21<br />
c) 19<br />
d) 20<br />
Click here to download Complete <strong>Answers</strong> of <strong>QNT</strong> <strong>561</strong><br />
11. The question, "Should products be withdrawn if even one death is<br />
associated with its prescribed use, even if no fault for the tampered<br />
product accrues to the manufacturer?" is an 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<br />
sales <strong>and</strong> recorded the amounts charged for each of three types of<br />
credit cards: MasterCard, Visa, <strong>and</strong> Discover. Six MasterCard sales,<br />
seven Visa, <strong>and</strong> five Discover sales were recorded. The store used an<br />
ANOVA to test if the mean sales for each credit card were equal. What<br />
are the degrees of freedom for the F statistic?<br />
a) 2 in the numerator, 15 in the denominator<br />
b) 6 in the numerator, 15 in the denominator<br />
c) 18 in the numerator, 3 in the denominator
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