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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 draw histograms by calculating frequency density and how to use them to interpret different distributions. Find examples, key facts and a question to test your understanding.

  4. Learn how to calculate frequency density and relative frequency density for grouped data, and how to draw histograms with them. See examples, diagrams and related terms.

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

  6. About. Transcript. Here's how we make a histogram: 1. Collect your data and decide on the number and size of bins (categories) you want to divide your data into. 2. Count the number of data points that fall within each bin. 3. Draw a graph with the bins as the x-axis and the frequency counts as the y-axis. 4.