type I error


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error

 [er´or]
a defect or mistake in structure or function.
inborn error of metabolism a genetically determined biochemical disorder in which a specific enzyme defect produces a metabolic block that may have pathologic consequences at birth, as in phenylketonuria, or in later life.
measurement error the difference between what exists in reality and what is measured by a measurement method.
Type I error the rejection of a null hypothesis that is true.
Type II error acceptance of a null hypothesis that is false.

er·ror of the first kind

in a Neyman-Pearson test of a statistical hypothesis the probability of rejecting the null hypothesis when it is true.

type I error

1 in a test of a statistical hypothesis, the probability of rejecting the null hypothesis when it is true and should be accepted. It occurs when researchers observe a difference when in fact there is none. Also called alpha error, error of the first kind.
2 a false negative.

type I error

α error, false-positive error Statistics Rejection of the null hypothesis when it is true, or the error of falsely stating that 2 proportions are significantly different when they are the same