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Not sure about a box plot, but a box and whisker plot is a representation of statistical data for one variable (at a time).

It consists of a rectangular shape, the "box", plotted against a horizontal value axis. The left side of the box is the lower quartile of the data and the right side is the upper quartile. The median divides the box.

Extending out from both sides of the box are lines, the "whiskers", that reach to the minimum and maximum values.

So, a box and whisker plot is defined by

  • minumum,
  • lower quartile (Q1),
  • median (Q2),
  • upper quartile (Q3), and
  • maximum.

If there are outliers, they are usually excluded from the box and whiskers plot and are marked up separately as crosses.

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12y ago

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Q: What is a box plot?
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