A professor gives a statistics exam. The exam has 25 possible points. The scores for the students in the first classroom are as follows:

24 25 19 15 20 19 17 25 17

Calculate the sample size, n, and the sample mean, M.

n=

M=

While grading the exam, the professor realizes that one of the questions covered material that was not yet covered in the lectures. This question was worth 2 points, so she decides to add 2 points to everyone's score.

Calculate the new n and M.

n=

M=