Common ways to display data: Pie Chart

A pie chart provides some sense of quantity, for example, here each section of the ‘pie’ is in true proportion to the number of different procedures (1-4), carried out by a particular consultant.

The chart also shows total numbers of procedures, and the percentage of total procedures each number represents.

Using the pie chart, which procedure was carried out least often?

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Procedure 3 is carried out least often. It is the smallest section of the pie chart.

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Pie chart example
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