14.8 Test your R might!

For the following questions, use the pirates dataframe in the yarrr package

1. Is there a significant relationship between a pirate’s favorite pixar movie and the number of tattoos (s)he has? Conduct an appropriate ANOVA with fav.pixar as the independent variable, and tattoos as the dependent variable. If there is a significant relationship, conduct a post-hoc test to determine which levels of the independent variable(s) differ.

2. Is there a significant relationship between a pirate’s favorite pirate and how many tattoos (s)he has? Conduct an appropriate ANOVA with favorite.pirate as the independent variable, and tattoos as the dependent variable. If there is a significant relationship, conduct a post-hoc test to determine which levels of the independent variable(s) differ.

3. Now, repeat your analysis from the previous two questions, but include both independent variables fav.pixar and favorite.pirate in the ANOVA. Do your conclusions differ when you include both variables?

4. Finally, test if there is an interaction between fav.pixar and favorite.pirate on number of tattoos.