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.
Synonym(s): alpha error, type I error

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
References in periodicals archive ?
Because this inflation is not properly captured by either of the currently available standard error estimators, the use of either estimate of the standard error to perform a t-test of significance on the fitted linear parameter can result in an inflated type I error.
For those simulations, the relative bias ranged from -1.53 to 1.83, and the overall type I error when using the S-Plus standard error estimate to test the significance of [beta] (at the 0.05 level) was 0.25.
Figure 3 shows the type I errors observed when using t-tests based on the S-Plus estimate and the alternative estimate, respectively, to test the true null hypothesis that [beta] = 0.0087 at the 0.05 level of significance.
Exploring bias in a generalized additive model for spatial air pollution data
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