The variance of a data set is 4. What is the standard deviation?

Question

answers:

2

4

8

16

Answer 1

The standard deviation is the square root of the variance. Since the variance of the data set is 4, the standard deviation would be:

\[ \text{Standard Deviation} = \sqrt{\text{Variance}} = \sqrt{4} = 2 \]

So the correct answer is 2.