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• Type I error
  Type I error

  noun

  the error made in the statistical testing of a hypothesis by rejecting the null hypothesis when it is actually true.
• type I error
  type I error

  noun

  statistics the error of rejecting the null hypothesis when it is true, the probability of which is the significance level of a result

Type I error

American  

noun

1. the error made in the statistical testing of a hypothesis by rejecting the null hypothesis when it is actually true.

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type I error British  

noun

1. statistics the error of rejecting the null hypothesis when it is true, the probability of which is the significance level of a result

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Etymology

Origin of Type I error

First recorded in 1960–65

Example Sentences

Type I error: Frank does not go rock climbing because he considers that the equipment is not safe, when in fact, the equipment is really safe.

From Textbooks • Mar. 27, 2020

The error with the greater consequence would be the Type I error since couples would use the It’s a Boy Genetic Labs product in hopes of increasing the chances of having a boy.

From Textbooks • Mar. 27, 2020

The Type I error is to conclude that Jeffrey swims the 25-yard freestyle, on average, in less than 16.43 seconds when, in fact, he actually swims the 25-yard freestyle, on average, in 16.43 seconds.

From Textbooks • Mar. 27, 2020

The probability of making a Type I error is α.

From Textbooks • Nov. 29, 2017

A Type I error occurs when a true hypothesis is rejected, and a Type II error occurs when a false hypothesis is accepted.

From "Innumeracy: Mathematical Illiteracy and Its Consequences" by John Allen Paulos