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Null Hypothesis

Edited: March 15, 2021 (v0.0.1)

Nothing special to add here besides the definition of the null hypothesis itself.

In inferential statistics, the null hypothesis (often denoted H0) is a general statement or default position that there is no relationship between two measured phenomena or no association among groups. Testing (accepting, approving, rejecting, or disproving) the null hypothesis — and thus concluding that there are (or there are not) grounds for believing that there is a relationship between two phenomena (e.g. that a potential treatment has a measurable effect) — is a central task in the modern practice of science.