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# FM Two-way Frequency Table

## 2.2 Relationships between two Categorical Variables

### Discussing Associations between Categorical Datasets

• Remember to begin with context: what does the data represent?
• When analysing categorical datasets, try to find correlation, or lack of, between categories.
• You must also consider what this means in the context of the data. Does one cause the other? Do they tend to occur together? Is this the result of poor sampling practices?
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## 1.2 Displaying Distributions of Categorical Data

Visualising Categorical Data

### 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:
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