# Definitions for statistical significancesta·tis·ti·cal sig·nif·i·cance

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1. statistical significancenoun

A measure of how unlikely it is that a result has occurred by chance.

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1. Statistical significance

Statistical significance refers to two separate notions: ⁕the p-value, the probability that the observed data would occur by chance in a given single null hypothesis; or ⁕the Type I error rate α of a statistical hypothesis test, the probability of incorrectly rejecting a given null hypothesis in favor of a second alternative hypothesis. A fixed number, most often 0.05, is referred to as a significance level or level of significance; such a number may be used either in the first sense, as a cutoff mark for p-values, or in the second sense as a desired parameter in the test design. These two notions reflect distinct aspects of statistical analysis and measure different quantities which cannot be compared. However, they are often conflated. In the first approach p is often compared to 0.05, and in the second approach α is often set to 0.05, so combining these equations yields "", which is not a meaningful comparison. Due to this confusion, the notation α is sometimes used for a cutoff value of p even when the Neyman–Pearson approach is not being used. In this article, "statistical significance" is used in the sense of p-value, and to avoid confusion, α will not be used. See statistical hypothesis testing for further discussion.

### Numerology

1. Chaldean Numerology

The numerical value of statistical significance in Chaldean Numerology is: 4

2. Pythagorean Numerology

The numerical value of statistical significance in Pythagorean Numerology is: 7

## Translations for statistical significance

### From our Multilingual Translation Dictionary

• στατιστική σημασία

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"statistical significance." Definitions.net. STANDS4 LLC, 2023. Web. 2 Oct. 2023. <https://www.definitions.net/definition/statistical+significance>.

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