Kelsi's partner is a huge fan of frequently looking up movie ratings using websites like Rotten Tomatoes or IMDB. Both websites have combined user ratings, which allow anyone to contribute a review for a movie on their website. After using both websites, Kelsi wonders how different the user ratings for movies are between these two websites. Kelsi decides to compare:

Rotten Tomato$$s combined user$-$based rating $($out of $100)$

IMDB$$s combined user$-$based rating $($out of $100)$

Kelsi wonders whether the two websites offer different ratings for the same movies. To test this, they take a sample of $12$ movies from $2023($randomly sample $1$ movie from each month: January through December$)$ and record the user$-$based rating for Rotten Tomatoes and for IMDB, and record the ratings for those $12$ movies, recorded below on a $0-100$ scale. Suppose we can assume an

a$.$ Briefly explain what type of sample Kelsi collected.