A box plot summarises a distribution with its quartiles, a median line and whiskers, marking points beyond the whiskers individually. It is the right chart for penalty data precisely because it shows the spread rather than hiding it in an average.
data and analysis · updated 2026-09-08
See also
Interquartile range— The interquartile range is the span between the twenty-fifth and seventy-fifth percentiles, covering the middle half of the data. …
Outlier— An outlier is an observation far from the rest of the data. This site's charts show outliers rather than removing them, because in…