IGCSE Maths / Working with data

Completing a histogram from a part drawn graph revision notes

Edexcel International GCSE Maths (4MA1), chapter 19: Working with data, specification point 6.1a. Part of the full course.

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A histogram uses frequency density for the height of each bar, so the bar’s width matters as well as its height. Use the class width to move between a frequency in a table and a bar height, then check that the frequencies add to the given total.

More lessons in Working with data

• Bar charts, pie charts and pictograms
• Two-way tables and reading statistical diagrams
• Mean from a frequency table
• Estimated mean and modal class for grouped data
• Frequency density
• Drawing a histogram
• Reading frequencies from a histogram
• Estimating a frequency within a class
• Building a cumulative frequency table
• Plotting a cumulative frequency diagram
• Reading values from a cumulative frequency graph
• Estimating how many are above or below a value
• Estimating the median from a cumulative frequency diagram
• Estimating the interquartile range from a cumulative frequency diagram
• Comparing two cumulative frequency distributions
• Mean, median, mode and range
• Quartiles and the interquartile range for discrete data
• What a measure of spread tells you
• Using the interquartile range to compare distributions