statistical significance

Cultural  

1. In statistics, a number that expresses the probability that the result of a given experiment or study could have occurred purely by chance. This number can be a margin of error (“The results of this public opinion poll are accurate to five percent”), or it can indicate a confidence level (“If this experiment were repeated, there is a probability of ninety-five percent that our conclusions would be substantiated”).

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Example Sentences

See Examples For:

statistical significance

The findings have been rated 2.6 sigma, which is the system that marks the statistical significance of discoveries.

From BBC ● Sep. 2, 2026

The time-restricted group also tended to make fewer mistakes on tests involving memory and learning, although that difference did not reach statistical significance.

From Science Daily ● Jul. 27, 2026

Given the wide variability of individual IPOs’ returns in the first six months, it’s unclear how much statistical significance there is for the difference in the two groups’ average returns.

From MarketWatch ● Jul. 16, 2026

Although a high-dose combination of fianlimab and Libtayo showed improvement over Keytruda, the result didn’t reach statistical significance, Meacham noted.

From Barron's ● May 18, 2026

The early scientists did not even know how to perform a test for statistical significance.

From "The Invention of Science" by David Wootton

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