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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statistical significance

"At the smallest spatial scales explored in the experiment, the production rate of J/ψ particles is significantly suppressed, with a statistical significance of about three standard deviations."

From Science Daily ● Sep. 12, 2026

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

From BBC ● Sep. 2, 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

An absolutely fundamental concept, that of statistical significance, was first propounded by Ronald Fisher in 1925.

From "The Invention of Science" by David Wootton

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