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Bar Graph And Pie Chart. Bar graphs and pie charts can both be used to represent the same set of data. The data in a pie chart can also be used to calculate other data. These are not as reviled as the poor pie chart but theyre associated with some frequently made mistakes. The pie graph displays data on the students ages.
Overall the bar chart is a much more information-dense visualization than the pie chart. Units are measured in percentage. Pie charts are meant to express a part to whole relationship where all pieces together represent 100. Relative frequencies are more commonly used because they allow you to compare how often values occur relative to the overall sample size. Bar graphs and pie charts can both be used to represent the same set of data. Heres what they look like.
Age-wise night classes appealed more to older people than younger people.
If youre not certain whether a pie chart will be a good choice of visualization then its best to play it safe with a bar chart. Pie charts are meant to express a part to whole relationship where all pieces together represent 100. A pie chart can also be called a circle graph. Pie charts will work better for some data sets but bar graphs will work better for others. The Bar of Pie Chart provides a way to add additional categories to a pie chart without generating a pie chart too complex to read. A pie chart can also be called a circle graph.