Following are boxplots of diastolic blood pressure, in millimeters, for a sample of people aged 18–39 years, and a sample over 60 years old. The data are consistent with results reported by the National Health Statistics Reports.

a. Which group generally has higher blood pressure?

b. Approximately what percentage of people over 60 have blood pressure higher than the median for people aged 18–39? Is it closest to 25%, 50%, 75%, or 90%?

c. For which group are the blood pressures more spread out?

d. Are the blood pressures for people 18–39 skewed right, skewed left, or approximately symmetric?

e. Are the blood pressures for people over 60 skewed right, skewed left, or approximately symmetric?

Transcribed Image Text:

18-39 years Over 60 years 80 100 120 140 160 180