Question

given a variance of 64, what is the standard - deviation? 0 4096 6.8 8

Explanation:

Step1: Recall the formula

The standard - deviation $\sigma$ and variance $\sigma^{2}$ are related by the formula $\sigma=\sqrt{\sigma^{2}}$.

Step2: Substitute the variance value

Given $\sigma^{2}=64$, then $\sigma = \sqrt{64}$.

Step3: Calculate the square - root

$\sqrt{64}=8$.

Answer:

8