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:
Read More »1.2 Displaying Distributions of Categorical Data

1.1 Overview of Data Types

Categorical Data

  • Data which is sorted into groups is considered categorical data

Nominal Data

      • Categorical data with no hierarchy (i.e. one category is not “greater than” another) is considered nominal data

Example

Eye colour can be considered a nominal data type as the data (each person’s eye colour) can be placed into groups and there is no hierarchy

Ordinal Data

Read More »1.1 Overview of Data Types