A small p-value often means the observed data effect is statistically significant. Set a significance level to compare with the p-value to validate investment hypotheses. Utilizing p-values in ...

A mathematical ritual known as null hypothesis significance testing has led researchers astray since the 1950s.

Misusing p-values to support the idea that ESP exists may be relatively harmless, but when this practice is used in medical trials, it can have much deadlier results, says Baer.