LT

Test: 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.

Question qty: 10
Duration in minutes: 17
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Sample questions

  • What percentage of all data is represented by category a? diagrama
  • Calculate the mean of the data shown in the chart. diagrama
  • What value is shown by bar a? diagrama
  • The table shows the frequencies of values A–D. Which value occurred most often? lentele
  • What is the difference between the greatest and smallest values in the chart? diagrama
  • By how many units did the value increase from A to D? diagrama
  • What is the total of all values shown in the chart? diagrama
  • Which bar shows the greatest value? diagrama

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.

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