Question

In a statistics class, 10 scores were randomly selected with the following results (mean = 71.5): 74, 73, 77, 77, 71, 68, 65, 77, 67, 66.
What is the standard deviation?
A. 22.72
B. 12.00
C. 4.77
D. 516.20
E. 144.00

Answer

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