Definition of Null hypothesis

1. Noun. (statistics) A hypothesis set up to be nullified or refuted in order to support an alternative hypothesis. When used, the null hypothesis is presumed true until statistical evidence in the form of a hypothesis test indicates otherwise. Therefore, the null and the alternative hypothesis must be mutually exclusive and exhaustive. The use of the null hypothesis is controversial. ¹

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Medical Definition of Null hypothesis

1. The assumption that any observed difference between two samples of a statistical population is purely accidental and not due to systematic causes. (05 Dec 1998)

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Lexicographical Neighbors of Null Hypothesis

nul point
nul points
null-cell adenoma
null-subject language
null-subject languages
null anaphora
null and void
null cell
null cells
null character
null characters
null hypotheses
null hypothesis (current term)
null infinities
null infinity
null modem
null modems
null mutation
null object
null objects
null path length
null persistent
null pointer
null pointers
null recurrence
null recurrent
null set

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