power function

noun

Definition of power function

1 : a function of a parameter under statistical test whose value for a particular value of the parameter is the probability of rejecting the null hypothesis if that value of the parameter happens to be true
2 : a function (such as f(x) = axk) that equals the product of a constant and a power of the independent variable

First Known Use of power function

1914, in the meaning defined at sense 2

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The first known use of power function was in 1914

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