Movie executives want to know if a movie watcher’s heart rate increases when they watch certain types of movies. Subjects in the experiment were given a free movie ticket and randomly assigned to watch one of four movies: an action-adventure film, a horror film, a romantic comedy, or an animated children’s film. They measured the average heart rate of all subjects while watching the assigned film. Which of the following is the most appropriate statistical test to use to test if the average heart rate of the movie watchers was different for the four types of movies?

A. Matched pairs t-test

B. Chi-squared test for independence

C. ANOVA

D. Two-sample t-test

E. Inference for regression