11.79 Predicting movie revenue.
CASE 11.2 A plot of theater count versus box office revenue suggests that the relationship may be slightly curved.
movies
11.79
(a) . The quadratic term for theaters, , is significant and should be included in the model already containing Theaters. (b) For the first model, ; for the second model, . are 1 and should be included in a model that already contains Theaters. (c) with rounding error.