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To draw a histogram: 1. Add a frequency density column. 2. Draw and label your axes: - The y-axis should have the frequency density. - The x-axis should have the thing being measured. 3. Draw your bars - remember the width of the bars should correspond to the class widths.
Frequency density = frequency ÷ class width. The height of each bar shows frequency density.
The class width is the difference between the start and end value of the class.
Histograms are like bar charts but with varying bar widths. Rather than height, it is the area of each bar that shows frequency.
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