A bank with a branch located in a commercial district of a city has the business objective
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Suppose that another branch, located in a residential area, is also concerned with improving the process of serving customers in the noon-to-1 P.M. lunch period. Data are collected from a random sample of 15 customers and stored in Bank2. These data are:
a. Assuming that the population variances from both banks are equal, is there evidence of a difference in the mean waiting time between the two branches? (Use a = 0.05.)
b. Determine the p-value in (a) and interpret its meaning.
c. In addition to equal variances, what other assumption is necessary in (a)?
d. Construct and interpret a 95% confidence interval estimate of the difference between the population means in the two branches.
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Related Book For
Statistics For Managers Using Microsoft Excel
ISBN: 772
7th Edition
Authors: David M. Levine, David F. Stephan, Kathryn A. Szabat
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