Histogram

http://support.sas.com/documentation/cdl/en/procstat/63104/HTML/default/viewer.htm#procstat_univariate_sect070.htm

Histograms use bar graphs and are typically used to show the frequency of an event. The histogram above show the frequency of a certain length of microns. Histograms are important as they are used everyday to display critical factors and how often they occur ensuring that businessmen, scientists, or teachers can use the results to gain better results.