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  1. Learn how to use the frequency density formula to calculate the frequency, class width or frequency density of a class interval. See examples, worksheets and related lessons on histograms.

  2. Learn how to calculate and use frequency density to draw and interpret histograms with grouped data. Find definitions, formulas, examples and exam tips for CIE IGCSE Maths: Extended.

  3. Learn how to calculate frequency density from a grouped frequency table and use it to plot histograms. Find frequency density formula, examples, worksheet and common misconceptions.

  4. Learn how to draw histograms by calculating frequency density and how to use histograms to interpret different distributions.

  5. Learn how to calculate frequency density and relative frequency density for grouped data. See examples, diagrams and explanations of how to draw histograms with frequency density or relative frequency density.

  6. Learn how to calculate frequency density and draw histograms from frequency tables. See examples, formulas, and tips for interpreting histograms.

  7. With FD i = Frequency Density of bin i, F i = (absolute) Frequency of bin i, and w i = bin size of bin i. The formula for the relative frequency density is relatively easy, since this was the frequency density divided by the total of the absolute frequencies: