Linked from
The 21 pages that link to Null hypothesis, each with the reason it gives.
ZeroRelated: Statistical tests often encode an absence of effect as a parameter equal to zero.
P-valueRelated: The p-value is calculated assuming this hypothesis and its model are true.
Multiple comparisons problemRelated: False positives occur when a true null hypothesis is rejected.
Effect sizeRelated: Many tests assess evidence against a null value, often zero effect.
Jerzy NeymanRelated: Neyman’s testing framework specifies procedures for decisions about hypotheses.