The percentages of women and men who have high blood pressure are shown in Table 79 for various age groups.

Let W and M be the percentages of women and men, respectively, at age a years who have high blood pressure.
a. Construct a scatterplot that describes the association between ages and blood pressures for the women. Do the same for the men. Show both scatterplots in the same co- ordinate system if you know how to use colors or shapes to identify which points are for which gender.
b. Describe the four characteristics of the women€™s association. Compute and interpret r as part of your analysis.
c. Describe the four characteristics of the men€™s association. Compute and interpret r as part of your analysis.
d. On the basis of your responses to parts (b) and (c), a student concludes that aging causes high blood pressure. What would you tell the student?
e. On the basis of the ages you used to represent the age groups, at what age are women as likely as men to have high blood pressure? For people younger than that age, which gender is more likely to have high blood pressure? How about people older than that age?

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Table 79 Percentages of Women and Men Who Have High Blood Pressure Percent Age Group (years) 20-34 35-44 45-54 55-64 65-74 over 74 Age Used to Repre- sent Age Group (years) 27 39.5 49.5 59.5 69.5 80 Women 6.7 17.6 34.0 52.0 70.8 Men 9.1 24.4 37.7 52.0 63.9 801 721