A Researcher Had Young or Middle Age Participants Watch a PG-13

Multiple Choice

A researcher had young or middle age participants watch a PG-13 or an R-rated film. After viewing the film, the participants rated the amount of violence in the films-the higher the assigned rating, the more violent the film. The mean results in the four conditions were: $\begin{array} { l c c } & \text { PG-13 } & \mathrm { R } \\\text { Young } & 3.1 & 3.8 \\\text { Middle Age } & 3.2 & 8.5\end{array}$ Which of the following statements is least likely to be true?

A) An interaction between age and type of movie exists.
B) A simple main effect of participant age exists when the movie is rated R.
C) An interaction between age and type of movie exist for PG-13 movies but not for R-rated movies.
D) A simple main effect of participant age does not exist when the movie is rated PG-13.