index number

noun Statistics.

a quantity whose variation over a period of time measures the change in some phenomenon.

Origin of index number

First recorded in 1870–75

Also called index.

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British Dictionary definitions for index number

index number

noun

statistics a statistic indicating the relative change occurring in each successive period of time in the price, volume, or value of a commodity or in a general economic variable, such as the price level, national income, or gross output, with reference to a previous base period conventionally given the number 100

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