Refer to the Research in Nursing & Health (Vol. 35, 2012) study of the effectiveness of a pain intervention, Exercise 13.15. Recall that pain levels (measured on a 100-point scale) were recorded for a sample of 10 ICU patients 24 hours post surgery each week for 20 consecutive weeks. The data are repeated in the accompanying table. Now, you want to check process variation using an R-chart

a. Compute the centerline for the chart.

b. Compute the UCL and LCL for the R-chart.

c. Plot the ranges for the 20 weeks on the R-chart. Does the variation of the pain management process appear to be "in control"?

d. Apply pattern-analysis rules to the extended R-chart, part d. What do you observe?

Transcribed Image Text:

Week Range Week Range k K2的万8刀万的叫