Calcium hardness is measured hourly for a public swimming pool. Data (in ppm) for the last 32
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Calcium hardness is measured hourly for a public swimming pool. Data (in ppm) for the last 32 hours are shown in Table 5E.13 (read down from left). The process target is = 175 ppm.
a. Estimate the process standard deviation.
b. Construct a CUSUM chart for this process using standardized values of h = 5 and k = 1/2.
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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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