A website that rents movies online recorded the age and the number of movies rented during the past month for some of their customers. Here are their data:

Age Rentals

35 .... 9

40 .... 8

50 .... 4

65 .... 3

40 .... 10

30 .... 12

Make a scatterplot for these data. What does it tell you about the relationship between these two variables? From computer output, the regression line has

b0 = 18.9 and b1 = - 0.260.

a) Use the estimated regression equation to predict Rentals for all six values of Age.

b) Find the residuals ei.

c) Calculate the residual standard deviation, se.