Histogram

n. type of statistical graph

For the histogram used in digital image processing, see Color histogram. In statistics, a histogram is a graphical display of tabulated frequencies. A histogram is the graphical version of a table that shows what proportion of cases fall into each of several or many specified categories. The histogram differs from a bar chart in that it is the area of the bar that denotes the value, not the height, a crucial distinction when the categories are not of uniform width (Lancaster, 1974). The categories are usually specified as non-overlapping intervals of some variable. The categories (bars) must be adjacent.
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Noun
1. a bar chart representing a frequency distribution; heights of the bars represent observed frequencies
(hypernym) bar chart, bar graph

n. histogram, type of statistical graph

a vertical bar chart where the height of the bars represents the research data.