In fitting a least squares line to n = 15 data points, the following quantities were computed: SS,, = 55, SS,, = 198, SS,, = -88, i = 1.3, and = 35.

a. Find the least squares line.

b. Graph the least squares line.

c. Calculate SSE.

d. Calculate sZ.

e. Find a 90% confidence interval for P,. Interpret this estimate.

f. Find a 90% confidence interval for the mean value of y when x = 15.

g. Find a 90% prediction interval for y when x = 15.