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Charts and data

This test teaches students to read and interpret bar, line and pie charts and frequency tables, and to calculate totals, differences and averages.

Questions: 10Estimated time: 16 minutes
Charts and data
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Sample questions

  1. What value is shown by bar ___?___
  2. Which bar shows the greatest value?___
  3. What is the difference between the greatest and smallest values in the chart?___
  4. What is the total of all values shown in the chart?___
  5. Calculate the mean of the data shown in the chart.___

Reading charts and data

A chart presents data visually, but its title, axes, units and scale must be read before calculating. A bar chart compares categories, a line chart shows change and a pie chart represents parts of a whole.

Working method

  • Determine what one interval or symbol represents.
  • Locate the required categories and read their values accurately.
  • Calculate a total, difference, proportion or mean according to the question.

A common mistake is to calculate before checking the scale. If axis labels increase by 5, one interval does not represent one unit. The final answer should describe the data rather than give an unexplained number.

A cat explains a mathematics task at a board