INTERPOL=BOXT20 specifies a box plot with tops and bottoms on its whiskers, and the high and low bounds at the 80th and 20th percentiles. CO= colors the boxes and whiskers. BWIDTH= affects the width ...

The medians of two box plots are significantly different at approximately the 0.05 level if the corresponding notches do not overlap. For example, in Output 18.3.1, the median for December 20 is ...