Find the variance of the data 4, 8, 1, 10, 11, 2, 1, 11 (treat them as a whole population).

Answer and explanation

Correct answer: B.

  1. Step 1: Mean .
  2. Step 2: Variance .
Answer
.
Why not the others: : the sample variance (dividing by ) is calculated. : that is the mean. : it uses the mean of squares without subtracting the squared mean.

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