Random samples of size n=36 are taken from a population with mean =150 and standard deviation
Question:
Random samples of size n=36 are taken from a population with mean µ =150 and standard deviation σ = 42.
a. Construct the centerline and the upper and lower control limits for the x chart.
b. Suppose five samples of size 36 produced the following sample means: 133, 142, 150, 165, and 169. Plot these values on the x chart.
c. Are any points outside the control limits? Does it appear that the process is under control? Explain.
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a Centerline 150 UCL LCL b c There are no points outside of t...View the full answer
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Related Book For 
Essentials Of Business Statistics Communicating With Numbers
ISBN: 9780078020544
1st Edition
Authors: Sanjiv Jaggia, Alison Kelly
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