Bath concentrations are measured hourly in a chemical process. Data (in ppm) for the last 32 hours
Question:
(a) Estimate the process standard deviation.
(b) Construct a tabular CUSUM for this process, using standardized values h= 5 and k = ½. Interpret this chart.
Transcribed Image Text:
TABLE 9E.4 Bath Concentration 160 186 190 206 158 195 189 210 150 179 185 1216 151 184 182 212 153 175 1S 211 154 192 180 202 158 186 183 205 162 197 186 197
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Related Book For
Introduction to Statistical Quality Control
ISBN: 978-1118146811
7th edition
Authors: Douglas C Montgomery
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