Table C.13 gives systolic blood pressure readings (first introduced in Exercise A.36 on page 150) for Intensive Care Unit patients in their teens and those in their eighties.

Table C.13

(a) Find and interpret a 95% confidence interval for the mean systolic blood pressure for each group. Which has a larger margin of error? What aspect of the data is the cause of that larger margin of error?
(b) Test to see if there is a difference in systolic blood pressure readings between ICU patients in their teens and those in their eighties.

Exercise A.36

How does the variability in systolic blood pressure compare between ICU patients in their teens and those in their eighties for the patients in the dataset ICUAdmissions? The values for each group are given in Table A.8. Use technology to find the five number summary, the range and IQR, and the standard deviation in each case and compare the measures of spread for the two groups.

Table A.8

Transcribed Image Text:

104 130 Teens 100 100 136 104 112 130 140 140 142 146 156 Eighties 100 110 130 135 80 141 100 190 110 122 136 138 140 190 162 100 100 104 104 112 130 130 136 140 140 142 146 156 Eighties 80 100 100 110 110 122 130 135 136 138 140 141 162 190 190 Teens