In an effort to estimate the mean dollars spent per visit by customers of a food store,
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Question:
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% confidence interval estimate, the upper limit of the confidence interval estimate is:
a) About $47.69
b) About $2.02
c) Approx. $65.90
d) None of the above
Related Book For
Elementary Statistics
ISBN: 978-0538733502
11th edition
Authors: Robert R. Johnson, Patricia J. Kuby
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