# How to do standard deviation

Contents

## How standard deviation is calculated?

To find the

**standard deviation**, we take the square root of the variance. From learning that**SD**= 13.31, we can say that each score deviates from the mean by 13.31 points on average.## How do you do standard deviation step by step?

Overview of how to calculate

**standard deviation** Here’s a quick preview of the **steps** we’re about to follow: **Step** 1: Find the mean. **Step** 2: For each data point, find the square of its distance to the mean. **Step** 3: Sum the values from **Step** 2.

## How do you find the standard deviation quickly?

## What does the standard deviation tell you?

The

**standard deviation**is the average amount of variability in your data set. It**tells you**, on average, how far each score lies from the mean.## What is the symbol for standard deviation?

The

**symbol**‘σ’ represents the population**standard deviation**.