null hypothesis
noun Date: 1935 a statistical hypothesis to be tested and accepted or rejected in favor of an alternative; specifically the hypothesis that an observed difference (as between the means of two samples) is due to chance alone and not due to a systematic cause

New Collegiate Dictionary. 2001.

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  • null hypothesis — ➔ hypothesis * * * null hypothesis UK US noun [S] ► a theory that states that two groups that are being tested will be expected to show the same results until this is proved not to be true …   Financial and business terms

  • Null hypothesis — For the periodical, see Null Hypothesis: The Journal of Unlikely Science. The practice of science involves formulating and testing hypotheses, assertions that are capable of being proven false using a test of observed data. The null hypothesis… …   Wikipedia

  • Null Hypothesis — A type of hypothesis used in statistics that proposes that no statistical significance exists in a set of given observations. The null hypothesis attempts to show that no variation exists between variables, or that a single variable is no… …   Investment dictionary

  • null hypothesis — noun 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… …   Wiktionary

  • null hypothesis — noun Etymology: null (I) : a statistical hypothesis to be tested and accepted or rejected in favor of an alternative; specifically : the hypothesis that an observed difference (as between the means of two samples) is due to chance alone and not… …   Useful english dictionary

  • null hypothesis — see significance * * * the particular hypothesis under investigation; termed null because it frequently asserts a lack of effect or of difference. Symbol H0. Cf. alternative h …   Medical dictionary

  • null hypothesis — (in the statistical testing of a hypothesis) the hypothesis to be tested. Cf. alternative hypothesis. [1930 35] * * * …   Universalium

  • null hypothesis — /nʌl haɪˈpɒθəsəs/ (say nul huy pothuhsuhs) noun a hypothesis which is set up so that it can be proved wrong in order to establish a support for an alternative hypothesis which the experimenter believes to be true …   Australian English dictionary

  • null hypothesis — noun (in a statistical test) the hypothesis that any observed differences between two populations are due to sampling or experimental error …   English new terms dictionary

  • null hypothesis — The principle underlying significance tests , which proposes that any differences observed between two samples, or sub sections of one sample, are in fact due to random sampling error rather than to real differences …   Dictionary of sociology

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