Interpreting data graphs

Read values off pie charts, bar graphs, histograms, and pictograms, and use them to draw conclusions (comparisons, totals, percentages) -- not to construct the displays, which sits in the more granular pie/pictogram and bar/histogram LOs. Includes an introductory sample-versus-census discussion as a lead-in to why data is displayed graphically.

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Learning objective overview

Master Teaching Guide coverage for this objective.

Resources

Terminology

  • Sample
  • Census
  • Axis (x-axis, y-axis)
  • Scale
  • Key / Legend
  • Sector
  • Frequency
  • Continuous vs. Discrete Data

Task goals

  • Read a single value directly off a bar graph, histogram, pie chart, or pictogram (using its key).
  • Compare categories or classes within one display to find the most/least common, or the modal class of a histogram.
  • Find a total, a difference, a percentage, or a fraction from a chart's values, including combining more than one bar or class.
  • Distinguish a bar graph (discrete/categorical data, gaps between bars) from a histogram (continuous/grouped data, bars touching).
  • Explain the difference between a sample and a census, and why a well-chosen sample can give a reliable conclusion without surveying an entire population.

Key skills

  • Interpret pie charts
  • Interpret bar graphs
  • Interpret histograms
  • Interpret pictograms
  • Sample vs census

Quick stats

  • 0 total questions
  • 3 difficulty levels
  • Answers included
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