The viscosity of a polymer is measured hourly. Measurements for the last 20 hours are shown as
Question:
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.
Transcribed Image Text:
Test Viscositv Test Viscositv 11 3174 2 2785 12 3102 3058 132762 4 3064 14 2975 5 2996 15 2719 6 2882 16 2861 7 2878 17 2797 2920183078 9 3050 19 2964 10287020 2805 2838
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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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