A regression of height (X, in inches) on hourly earnings (Y, in dollars), yields the following results:
n=26 SSR=200 SST=1000 r=.447 SX=3 ΣYi=780 ΣXi=1872
a. What is the value of ybar? b
b. What is the value of b1 in the regression Y=b0+b1X?
c. What is the variance of the regression? That is, what is the value of Se2?
d. What is the predicted hourly earnings for someone 67 inches tall? $25 What is the 99% confidence interval for β1 (true population slope coefficient).