A box plot splits the data into quarters

State that approximately 1/4 of the values lie in each section of a box plot. (Give the definition of the median but there is no need to define precicely the upper and lower quartiles — different software uses different definitions and all that matters in practice is that a consistent definition is used.)

Drag the median, quartiles and extremes to show how differently shaped distributions are displayed by box plots.

Change the display to a histogram and again drag the five box plot values. Explain that approximately 1/4 of the histogram area is in each section of the box plot so, again, high density corresponds to close box plot values.