The viscosity of a polymer is measured hourly. Measurements for the last 20 hours are shown as
Question:
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a. Does viscosity follow a normal distribution?
b. Set up a control chart on viscosity and a moving range chart. Does the process exhibit statistical control?
c. Estimate the process mean and standard deviation.
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a MTB Graph Probability Plot The normality assumption for viscosity measurements appears re...View the full answer
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Related Book For 
Managing Controlling and Improving Quality
ISBN: 978-0471697916
1st edition
Authors: Douglas C. Montgomery, Cheryl L. Jennings, Michele E. Pfund
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