QNT 561 Final Exam Question With Answers

c) At least one pair of population means is different.
d) 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?
a) 25
b) 21
c) 19
d) 20
QNT 561 Final Exam Solution QNT 561 Final Exam (Latest)
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 The question, "Should products be withdrawn if even one death is associated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) _____.
a) strip data mining issue
b) unresearchable question
c) ill-defined problem
d) 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?
a) 2 in the numerator, 15 in the denominator
b) 6 in the numerator, 15 in the denominator
c) 18 in the numerator, 3 in the denominator
d) 3 in the numerator, 18 in the denominator