Chart type · Trend
Histogram
Frequency bars across bins.
How to read it
The bars are bins rather than categories, so their order is fixed. Height is how many cases fell in that range.
Best for
Distributions, especially where the average hides the shape.
When not to use it
The data is categorical — that is a bar chart, and there the gaps between bars mean something.
The common mistake
Adjusting bin widths until the distribution looks the way you expected. Bin size can manufacture a second peak or erase one.
Example data
How spread out are commute times?
One-way commute time, surveyed office workers
The sample dataset this format ships with, drawn the way the site draws every clip's numbers — hover, sort or step through it. Figures as given by its source line: Synthetic teaching example.
Examples
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