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A psychology professor has administered a 10-point quiz to his class. The scores are as follows: 10, 9, 9, 9, 8, 8, 8, 8, 7,

A psychology professor has administered a 10-point quiz to his class. The scores are as follows: 10, 9, 9, 9, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 5, 5, 4, 4, 3, and 2. What is the variance of this data?

a.4.33b.4.55c.90.95d.2.13

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