Movie ratings. Does the cost of making a movie depend on its audience? Here’s a scatterplot of the same data we examined in Exercise 27.

Movies with an R rating are colored blue, those with a PG-13 rating are purple, and those with a PG rating are green. Regression lines have been found for each group. (The red points are G-rated, but there were too few to fit a line reliably.)

a) In what ways is the relationship between run times and budgets similar for the three different ratings groups?

b) How do the costs of R-rated movies differ from those of PG-13 and PG rated movies? Discuss both the slopes and the intercepts.

c) The film King Kong, with a run time of 187 minutes, is the purple point sitting at the lower right. If it were omitted from this analysis, how might that change your conclusions about PG-13 movies?

Transcribed Image Text:

160 Budget (millions of dollars) 20 120 80 80 40 PG + G . PG-13 R 0+ 90 120 150 180 Run Time (minutes)