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Range (statistics)
In arithmetic, the range of a set of data is the difference between the largest and smallest values.
However, in descriptive statistics, this concept of range has a more complex meaning. The range is the size of the smallest interval which contains all the data and provides an indication of statistical dispersion. It is measured in the same units as the data. Since it only depends on two of the observations, it is most useful in representing the dispersion of small data sets.
==Independent identically distributed continuous random variables==
For ''n'' independent and identically distributed continuous random variables ''X''1, ''X''2, ..., ''X''''n'' with cumulative distribution function G(''x'') and probability density function g(''x'') the range of the ''X''''i'' is the range of a sample of size ''n'' from a population with distribution function ''G''(''x'').
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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