# GCSE Statistics - Standard Deviation

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- Created by: YellowYeti
- Created on: 15-06-12 14:33

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**Standard deviation shows how spread about the data is about the mean.**

**Example:**

Here's a set of data, for which I will calculate the standard deviation:

Here are the heights of 5 Irish leprechauns:

500cm, 650mm, 430mm, 410mm, 560mm.

**Step 1:**** **Firstly, **find the mean:**

- 500+650+430+410+560 = 2550mm
- 2550 ÷ 5 = 510
- The mean is 510mm.

**Step 2:** Secondly, **find the difference between the data and the**…

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