EBK PRINCIPLES OF OPERATIONS MANAGEMENT
EBK PRINCIPLES OF OPERATIONS MANAGEMENT
11th Edition
ISBN: 9780135175859
Author: Munson
Publisher: VST
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Chapter 10, Problem 44P
Summary Introduction

To identify: If the sample is large enough for the analyst Person AP to be 99.73% confident and if the standard time is within the range of 5% of the true value.

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The management of a drinking water refill station is planning to estimate the average cost of paying technicians to maintain the water refill stations. The management wants their OM to provide normal times and standard times for cleaning a station based on observed values, rating factors (RF), and a 20% allowance.
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8.  A teller at a drive-up window at a bank had the following service times (in minutes) for 20 randomly selected customers: SAMPLE 1 2 3 4 4.5 4.6 4.5 4.7 4.2 4.5 4.6 4.6 4.2 4.4 4.4 4.8 4.3 4.7 4.4 4.5 4.3 4.3 4.6 4.9 Select a chart to monitor the central tendency of the process, what are the 3-sigma control limits using a mean chart? Keep 3 decimal places.   Select one: a. LCL = 4.212, UCL = 4.788 b. LCL = 4.414, UCL = 4.586 c. LCL = 4.245, UCL = 4.755 d. None of the other options. e. LCL = 4.385, UCL = 4.615
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