Visualising Categorical Data

**Contents**

### Frequency

- The number of times a particular value or category occurs is known as the
**frequency**. This is often used as the basis for displaying and analysing categorical data.

Example

In the following dataset of colours:

Red Red Blue Red

The frequency of each colour is:

Red: 3

Blue: 1

### Percentage

- The proportion of the total data points which belong to a particular group is known as the
**percentage**. - This can be calculated using the formula: