Question

3.2 measures of spread: standard deviation and variance
which of the following represents the population standard deviation?
$sigma^{2}$
$s$
$sigma$
$s^{2}$

Explanation:

In statistics, the symbol $\sigma$ represents the population standard - deviation. $\sigma^{2}$ is the population variance, $s$ is the sample standard - deviation, and $s^{2}$ is the sample variance.

Answer:

$\sigma$