QuickE Lube has been monitoring its customer service times over the past 5 days. Each day...
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QuickE Lube has been monitoring its customer service times over the past 5 days. Each day they took a sample of 10 customers and recorded the actual service times for those customers. The table below shows the sample mean and sample range for each of the 5 past samples. What are the three-sigma lower and upper control limits the company should use to construct an X-Bar Chart for this service time data? Sample No. 1 Mean Range 20.2 4.1 2 18.6 0.8 3 19.4 3.2 4 22.0 2.9 5 21.8 1.0 QuickE Lube has been monitoring its customer service times over the past 5 days. Each day they took a sample of 10 customers and recorded the actual service times for those customers. The table below shows the sample mean and sample range for each of the 5 past samples. What are the three-sigma lower and upper control limits the company should use to construct an X-Bar Chart for this service time data? Sample No. 1 Mean Range 20.2 4.1 2 18.6 0.8 3 19.4 3.2 4 22.0 2.9 5 21.8 1.0
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Calculate the Average Range Rbar Rbar Sum of Ranges Number of Samples Rbar 41 08 32 29 10 5 R... View the full answer
Related Book For
Introduction to Management Science A Modeling and Cases Studies Approach with Spreadsheets
ISBN: 978-0078024061
5th edition
Authors: Frederick S. Hillier, Mark S. Hillier
Posted Date:
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