In a Finance class, scores of students were randomly selected with the following results : 74, 73, 77, 77, 71, 68, 65, 77, 67, and 66. The sample standard deviation for this distribution is:

Question

a. 22.72

b. 20.45

c. 4.77

d. 204.50

e. 4.52

Answer 1

the answer is 4.77. 3 of the answers are larger than the spread or variance of the highest and lowest score so they be excluded.

I just used excel to calculate the st. dev for this data set.