(5.37) How strongly do physical characteristics of sisters and brothers correlate? Here are data on the heights (in inches) of 11 adult pairs (Use a statistics technology and not the rounded regression equation to solve the problems):

Brother	71.6	63.4	65.8	66.3	76.6	71.3	74.4	78.6	74.8	59.1	60.2
Sister	72.8	61	62.4	61.3	68.7	61.4	68	64.9	65	60.7	60.7

What is the value of the correlation rounded to at least three decimal places? r =

What is the equation of the least-squares regression line for predicting a sister's height from her brother's height? (Round the coefficients to at least two decimal places.)

y=y^=+ x

If Damien is 69.8 inches tall, predict the height ( 0.1 inch) of his sister Tonya:

height = inches.

What percent of the variation in the sisters' height among these subjects is explained by the straight-line relationship with the brother's height? (Give your answer as a whole number.) %