Frequency distribution

Japanese: 度数分布 - どすうぶんぷ（英語表記）frequency distribution

A distribution of statistical data expressed as a frequency (the number of items belonging to each interval). Also called a frequency distribution. An example would be the scores of 500 examinees on an entrance exam with a maximum score of 200 points, divided into 10 intervals with 20-point intervals between 0 and 200 points, and the distribution of the number of people in each interval. A table of this distribution is called a frequency distribution table. The intervals are called classes, and the minimum value of the variable in each class is called the lower limit of the class, the maximum value is called the upper limit of the class, and the range of the classes is called the class interval. The median value of each class is called the class value. Note that if the above example of the number distribution is rearranged by the total number of people who scored below the upper limit of the class for each interval, in other words, if the cumulative frequency is shown, it is called a cumulative frequency distribution.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

統計資料について，度数 (各区間に属するものの個数) で表わした分布状態のこと。頻度分布ともいう。 200点満点の入試の成績を 500人の受験生について，0点から 200点の間を 20点間隔の 10個の区間に分けて各区間ごとの人数の分布で示したものがその例。この分布を表にしたものを度数分布表という。区間のことを階級といい，各階級での変数の最小値を級下限，最大値を級上限，階級の幅を級間隔という。また各階級の中央の値を階級値 class markという。なお上例の人数分布を，各区間ごとに，その区間の級上限以下の点をとった合計の人数で整理し直したもの，すなわち積重ねの度数を示したものを累積度数分布 cumurative frequency distributionという。

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