The data from Exercise 3.26 were entered into a MINITAB worksheet, and the following output was obtained.

a. Use the MINITAB output or the original data to find the correlation between the number of weeks in release and the gross to date.

b. For the pair of variables described in part a, which of the variables would you classify as the independent variable? The dependent variable?

c. Use the MINITAB output or the original data to find the correlation between the weekend gross and the number of screens on which the movie is being shown. Find the correlation between the number of screens on which the movie is being shown and the per-screen average.

d. Do the correlations found in part c confirm your answer to Exercise 3.26a? What might be the practical reasons for the direction and strength of the correlations in part c?