What is the sample variance of the values 3, 5 and 7?
Correct answer: C. 4
- A. 2
- B. 3
- C. 4
- D. 6
Explanation
The mean is 5, and the squared deviations are 4, 0 and 4. Their sum is 8, which is divided by n − 1, or 2, for a sample variance of 4.
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