type I error

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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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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.
Farlex Partner Medical Dictionary © Farlex 2012

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
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
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.