Statistics › Section B · Descriptive statistics › Topic B.2
Histograms, frequency polygons, and time series
A bar graph's categories are labels; a histogram's axis is a measuring scale. This topic builds histograms, names the shapes they can take, adds frequency polygons and time series, and practises the four-part description every data set deserves.
In this topic
- Why histograms?
- Building a histogram
- Histogram versus bar graph
- Describing a distribution
- Shape vocabulary
- Worked example: a histogram of wait times
- Worked example: describing the histogram
- Frequency polygons
- Time series graphs
- Common mistakes to avoid
- Key takeaways
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