Pie charts are often used to show percentages of a whole. However, Professor Adrian Barnett, a statistician at the Queensland University of Technology, and researcher Victor Ogwoma argue that ``pie ...

Adrian Barnett is a member of the Statistical Society of Australia. Victor Oguoma is a member of the Statistical Society of Australia. Our lives are becoming increasingly data driven. Our phones ...

What an outstanding group of readers I have! Both the quality and the quantity of entries to the Graph Makeover Contest were amazing. There were 29 entries to the first part of the contest which ...

A data set that occurs frequently consists of the values or the percentage breakdown of several categories for two time periods. A common way of plotting these data is to use a pair of pie charts.

The type of graph you use depends on the type of data you want to represent. In a bar chart, the height of the bar shows the frequency of the result. As the height of bar represents frequency, the ...