histogram

1. (statistics) A graphical display of numerical data in the form of upright bars, with the area of each bar representing frequency.Examples: "Such distinctions, however, require detailed information, such as histograms of the distribution of energy use among residential customers, both by month and by year."; "The use of the piecewise linear frequency polygon (FP) in place of the underlying histogram would seem mainly a graphical advantage."; "A histogram is constructed by placing the variable of interest on the horizontal axis and the frequency, relative frequency or percent frequency on the vertical axis.[…]Histograms for data found in applications are never perfectly symmetric, but the histogram for many applications may be roughly symmetric."