Figure A.10 shows a histogram of the systolic blood pressure (in mm Hg) for all 200 patients admitted to the Intensive Care Unit, from the ICUAdmissions dataset. The mean and standard deviation of these 200 numbers are xÌ… = 132.28 and s = 32.95.

Figure A.10

(a) Is it appropriate to use the 95% rule with these data? Why or why not?
(b) Use the 95% rule to give an interval that is likely to contain about 95% of the data values.
(c) Use the data in the ICUAdmissions dataset to count the actual number of data values, and find the percent of data values, lying within the interval given in part (b).
(d) Is the result for the sample close to the result predicted by the 95% rule?

Transcribed Image Text:

30 20 - 10- 125 150 175 225 250 50 75 100 200 Systollc blood pressure (mm Hg) Frequency