of a branch of a local bank has the business objective of reducing the waiting times of
Question:
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 minute 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 Bank Time, are as follows:
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a. Construct control charts for the range and the mean.
b. Is the process in control?
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a R chart UCL D 4 Rbar 2282 3275 74736 LCL does not exist Xbar chart UCL A 2 Rbar 59413 0729 327...View the full answer
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Related Book For 
Business Statistics A First Course
ISBN: 9780321979018
7th Edition
Authors: David M. Levine, Kathryn A. Szabat, David F. Stephan
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