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Also called a "box and whisker diagram"; a visual diagram of a continuous data
set's center, distribution, and spread in five-point summary form: 1) the
middle 50% (i.e., the box itself); 2) the median (i.e., 50% of the data appears
above it; 50% appears below it); 3) the 25th quartile (i.e., no more than 25%
of the data appears below it); 4) the 75th quartile (i.e., no more than 25% of
the data appears above it); and 5) identification of the limits of the data set
and any "outliers" (i.e., "whiskers" of the plot that exceed 1.5 times the
length of the inner quartiles). |
