If we use the amounts (in millions of dollars) grossed by movies in categories with PG, PG-13,

Question:

If we use the amounts (in millions of dollars) grossed by movies in categories with PG, PG-13, and R ratings, we obtain the SPSS analysis of variance results shown below. The original sample data are listed in Data Set 9 in Appendix B. Use a 0.05 significance level to test the claim that PG movies, PG-13 movies, and R movies have the same mean gross amount.