In this video, we will learn how to interpret and create a box & whisker plot, learn how to quickly look at a box and whisker plot and determine the lowest value, first quartile, median, third quartile and greatest value.

For Example:

In this Box & Whisker Plot, the lowest value in a set is identified by the line at 12. The greatest value in a set is identified by the line at 25. The lines connecting the lowest and greatest values to the box are called the “Whiskers”.

The box is made up of three “Quartiles”. The second quartile is the median of the set between the lowest value and the greatest value. The second quartile in this plot is identified by the line at 13. The first quartile is the median of the set between the lowest value and the second quartile. The second quartile in this plot is identified by the line at 18. The third quartile is the median of the set between the second quartile and the greatest value. The second quartile in this plot is identified by the line at 22.

In a Box & Whisker Plot, we know 25% of the numbers in the set is locate between the lowest value and the first quartile. We also know 25% of the numbers in the set is locate between the first quartile and the second quartile, 25% of the numbers in the set is locate between the second quartile and the third quartile, and 25% of the numbers in the set is locate between the third quartile and the greatest value.

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