What does the length of tye box plot mean

In its simplest form, the boxplot presents five sample statistics - the minimum, the lower quartile, the median, the upper quartile and the maximum - in a visual display ... The length of the box is thus the interquartile range of the sample. The other dimension of the box does not represent anything in particular.

The box of the plot is a rectangle which encloses the middle half of the sample, with an end at each quartile.

Step-by-step explanation:

Its talking about the middle of the box