Question: Reconsider the data in Exercise 5.35. Set up and apply an EWMA control chart to these data using and . In exercise Calcium hardness is
Reconsider the data in Exercise 5.35. Set up and apply an EWMA control chart to these data using
and
.
In exercise
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.

0.05
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