A representative cross section of several thousand husband-wife pairs is obtained. Looking at the ages, the average age of the husbands is 46 years and the average age of the wives is 43 years, with both groups having the same standard deviation of 13 years. The linear correlation coefficient between the ages of husband and wife is 0.95. The scatterplot is elliptical.
Using the least squares regression line you just found, the average age of husbands whose wives are 43 years old is closest to which of these five choices?
A 43 years old
B 46 years old
C 58.35 years old
D 65 years old
E 66 years old
Using the least squares regression line you just found, the average age of husbands whose wives are 63 years old is closest to which of these five choices?
A 43 years old
B 46 years old
C 58.35 years old
D 65 years old
E 66 years old
Using the least squares regression line you just found, the standard deviation of the ages of the husbands whose wives are 63 years old is closest to which of these five choices?
A 1.27 years
B 4 years
C 13 years
D 26 years
E 46 years