English

Noun

significance level ‎(plural significance levels)

1. Used other than as an idiom: see significance,‎ level.
2. (statistics) A measure of how likely it is to draw a false conclusion in a statistical test, when the results are really just random variations.
3. (statistics) The probability, usually expressed as a percentage, of making a decision to reject the null hypothesis when the null hypothesis is actually true; the probability of making a type 1 error).

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