Question: 17.32 Estimating the control chart limits from past data. Table 17.7 gives data on the losses (in dollars) incurred by a hospital in treating DRG

17.32 Estimating the control chart limits from past data. Table 17.7 gives data on the losses (in dollars)

incurred by a hospital in treating DRG 209 (major joint replacement) patients.10 The hospital has taken from its records a random sample of 8 such patients each month for 15 months.

(a) Make an s control chart using center lines and limits calculated from these past data. There are no points out of control.

(b) Because the s chart is in control, base the x chart on all 15 samples. Make this chart. Is it also in control?

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