A bank with a branch located in a commercial district of a city has the business objective
Question:
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.
Step by Step Answer:
Business Statistics A First Course
ISBN: 9780321979018
7th Edition
Authors: David M. Levine, Kathryn A. Szabat, David F. Stephan