13.5 Test your R might!

The following questions are based on data from either the movies or the pirates dataset in the yarrr package. Make sure to load the package first to get access to the data!

1. Do male pirates have significantly longer beards than female pirates? Test this by conducting a t-test on the relevant data in the pirates dataset. (Hint: You’ll have to select just the female and male pirates and remove the ‘other’ ones using subset())

2. Are pirates whose favorite pixar movie is Up more or less likely to wear an eye patch than those whose favorite pixar movie is Inside Out? Test this by conducting a chi-square test on the relevant data in the pirates dataset. (Hint: Create a new dataframe that only contains data from pirates whose favorite move is either Up or Inside Out using . Then do the test on this new dataframe.)

3. Do longer movies have significantly higher budgets than shorter movies? Answer this question by conducting a correlation test on the appropriate data in the movies dataset.

4. Do R rated movies earn significantly more money than PG-13 movies? Test this by conducting a t-test on the relevant data in the movies dataset.

5. Are certain movie genres significantly more common than others in the movies dataset? Test this by conducting a 1-sample chi-square test on the relevant data in the movies dataset.

6. Do sequels and non-sequels differ in their ratings? Test this by conducting a 2-sample chi-square test on the relevant data in the movies dataset.