Chapter 4, Problem 34SE

Hand and Foot Length for Women The computer output shown below is for predicting foot length from hand length (in centimeters) for a group of women. Assume the trend is linear. Summary statistics for the data are shown in the table below.

a. Report the regression equation, using the words hand and foot, not $x$ and $y$.

b. Verify the slope by using the formula $b=r\frac{s_y}{s_x}$.

c. Verify the y-intercept by using the formula $a=\bar{y}-b\bar{x}$.

d. Using the regression equation, predict the foot length (in centimeters) for someone who has a hand length of 18 centimeters.