Calculating the mean when adding or subtracting a constant A professor gives a statistics exam. The exam has 100 possible points. The scores for the students in the second classroom are as follows:
44 92 88 56 96 88 56 80 72
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 8 points, so she decides to add 8 points to everyone’s score.
Calculate the new n and M.
n =
M =