A histogram displays the distribution of values for a single measure. A series of
bars represents the number of
observations in the measure that match a specific value or value range. The bar height can represent
either the exact number of observations or the percentage of all observations for
each value range.
Note: If you use the default number
of bins, then the minimum and maximum values on the histogram axis
might not match the actual extent of your data values. If you specify
the number of histogram bins, then the histogram axis matches your
data values exactly.