Two high school statistics students are studying in their school's library. They see the librarian seemingly selected random books from the shelves. The two students wonder aloud what they believe the librarian is doing. Student 1 states: "I bet she is selecting random books to try and find the average page number for the books in the library." Student 2 states: "No, I think she is selecting random books to estimate the proportion of books per category (fiction, non- fiction, etc.)" Which student is correct?