Consider the data on 25 patients, of a certain diagnosis-related group, on systolic blood pressure, blood glucose level, and total cholesterol level as shown in Table 4-5. The table shows values on these variables before and after administration of a certain drug. Assume that these variables are not independent of each other. What is an appropriate control chart to use?
(a) Construct a Hotelling's T2-chart using data before drug administration and comment on patient stability.
(b) Construct an individuals and a moving-range chart for blood glucose level before drug administration and comment. Are the conclusions from parts (a) and (b) consistent? Explain