Student Solutions Manual for Basic Business Statistics
Student Solutions Manual for Basic Business Statistics
13th Edition
ISBN: 9780321926708
Author: David M. Levine; Mark L. Berenson; Timothy C. Krehbiel; Kathryn A. Szabat; David F. Stephan
Publisher: Pearson Education
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Chapter 19, Problem 22PS

The manager of a branch of a local bank has the business objective of reducing the waiting times of customers for teller service during the 12:00 noon-to-1:00 P.M. lunch hour. A subgroup of four customers is selected (one at each 15-minuts interval during the hour), and the time, in minutes, is measured from when each customer enters the line to when he or she reaches the teller window. The results over a four-week period, stored in BankTime, are as follows:

Chapter 19, Problem 22PS, The manager of a branch of a local bank has the business objective of reducing the waiting times of

a. Construct control charts for the range and the mean.

b. Is the process in control?

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