It is believed that the muscle mass of a person tends to decrease with age. To investigate this relationship, a nutritionist randomly chose 15 women from 4 age groups (40-49, 50-59, 60-69, and...

It is believed that the muscle mass of a person tends to decrease with age. To investigate this relationship, a nutritionist randomly chose 15 women from 4 age groups (40-49, 50-59, 60-69, and 70-79) and determined their muscle mass. i 1 2 3 · · · 60 Age 43 41 47 · · · 76 M-Mass 106 106 97 · · · 74 (Dataset: CH01PR27.txt) (a) Fit a regression line to the data and plot it alongside the raw data. Do you think the regression line ts the data well? (Give reasons.