Twenty Students Were Randomly Selected from the Most Recent Graduating

Multiple Choice

Twenty students were randomly selected from the most recent graduating class at a Canadian university. The number of semesters they were enrolled was calculated (mean = 9.6)
7, 8, 10, 11, 8, 6, 10, 9, 9, 8, 13, 12, 8, 11, 11, 14, 8, 7, 10, 12

-What is the variance?

A) 8
B) 2.162
C) 9.5
D) 4.674
E) 21.846