NUMBAT OER - Open Educational Resources

Two types of graphs are appropriate for this type of data.

A pie chart shows the proportion of each category in the total observations. It is used to show proportionate data (eg percentages), using the angle of each slice to represent proportion. It is a convenient representation that most people find easy to 'read'.

Pie chart

A bar chart represents data in categories as a series of (usually vertical) bars, whose height corresponds to the value within that category. Bar charts may show either real values (ie the number of observations for a given category) or proportionate data.

Bar chart

In either case, the chart only works effectively for small numbers of categories (≤ 10).