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GCSE Maths

Statistics

Histograms

Histograms

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Key Points 

  • Used for continuous grouped data.

  • The bars touch because the data is continuous.

  • The vertical axis shows frequency density, not frequency.

  • Frequency density = Frequency ÷ Class width.

  • Area of each bar represents the frequency.

  • Unequal class widths require frequency density.


Keywords: histogram, frequency density, class width, continuous data, GCSE statistics.

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