# Null Hypothesis

##### Updated: October 21, 2020

Denoted `H_0`

(subscript 0)

The position that there is *no* relationship among two measured phenomenon or among groups. The central task of science is to prove that a relationship may exist between entities, implying that the null hypothesis *is false*.

Thus, centrally, science attempts to disprove the null hypothesis for a given field of questioning. This hypothesis is the default stance when approaching a statistical/scientific problem; i.e. the null hypothesis *begins* as true and it is up to the investigator to prove otherwise.