What is the population standard deviation of the data 4, 6, 6, 8?
Answer and explanation
Correct answer: C. √2 (about 1.41)
- Step 1: The mean is 6, and the squared deviations are 4, 0, 0, 4, which add to 8.
- Step 2: Variance = 8/4 = 2, so the standard deviation is √2, about 1.41.
Answer
√2 (about 1.41).
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