Question: 38
(Choose 1 answer)
In an effort to estimate the mean dollars spent per visit by customers of a food store, the manager has selected a
random sample of 100 cash register receipts. The mean of these was $45.67 with a sample standard deviation equal to
$12.30. Assuming that he wants to develop a 90 percent confidence interval estimate, which of the following is the width
of confidence interval that will be reported?
A. About 4.04
B. About 1.645
C. About 1.43
D. Nearly $50.20
E. None of the other choices is correct
Let Zoos = 1.645; Z:=1.28.
