Comparative Pie Charts

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Comparative Pie Charts

• A Hassack

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Comparative Pie Charts

• When comparing 2 or more sets of data use
  Comparative Pie Charts
• For accuracy areas need to be in same proportion
  as the totals displayed on the chart

For example
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Comparative Pie Charts

• E.g. 1 The Riverside Stadium only holds around
  35,000 bored people. St James Park holds a
  whopping 55,000 riveted fans.
• Radius of MFC chart 5 cm
• Area pr2 p x 52 25 p cm2

Area of NUFC Chart should be 20/35 0.57 57
bigger
pr2 1.57 x 25 p r2 1.57 x 25 r2 39.25 r
6.3 cm
5cm
MFC
NUFC
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Comparative Pie Charts

• This is the number of votes cast in the German
  elections of 1930 and 1932

The radius of the 1930 pie chart is 4 cm,
calculate the radius of the pie chart for 1932
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Comparative Pie Charts

• 2. The table shows how the number of British
  players in the Premier league has changed since
  1992.

If the radius for the 92/93 season is 5cm,
calculate the radius for the 2004/2005 season