In statistical inference of observed data of a scientific experiment, the null hypothesis refers to a general statement or default position that there is no relationship between two measured phenomena. Rejecting or disproving the null hypothesis – and thus concluding that there are grounds for believing that there is a relationship between two p...
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http://en.wikipedia.org/wiki/Null_hypothesis
A statement that there is no relationship between the independent and dependent variables and that any relationship observed is due to chance or fluctuations in sampling
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http://www.bath.ac.uk/catalogues/information/glossary/
(from the article `statistics`) ...to draw conclusions about a population parameter or a population probability distribution. First, a tentative assumption is made about the ... It is usual first to formulate a null hypothesis, which states that there is no effective difference between the observed sample mean and the ... [2 related ...
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http://www.britannica.com/eb/a-z/n/62
The null hypothesis is used in experimental research. It asserts arbitrarily that there is no relationship among the variables being studied. Then statistical tests are used to determine if any relationship shown by the research data is due to chance alone or to alternative hypotheses.
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The hypothesis that is being tested in a hypothesis-testing situation.
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http://www.daviddarling.info/encyclopedia/N/null_hypothesis.html
The set of restrictions on parameters that is formally being tested. 'The hypothesis that the restriction or set of restrictions to be tested does in fact hold.' (Davidson and MacKinnon, 1993, p. 78) It is standard to use the notation H
0 for the null hypothesis. The alternative hypothesis, that the restrictions do n...
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http://www.econterms.com/glossary.cgi?query=null+hypothesis
The hypothesis that experimental results are due to chance.
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http://www.encyclo.co.uk/local/20137
The null hypothesis, H0 represents a theory that has been put forward, either because it is believed to be true or because it is to be used as a basis for argument, but has not been proved. For example, in a clinical trial of a new drug, the null hypothesis might be that the new drug is no better, on average, than the current drug. We would write H...
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The hypothesis that experimental results are due to chance.
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http://www.encyclo.co.uk/local/20157
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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http://www.encyclo.co.uk/local/20973
in a statistical test it is the statement of the hypothesis to be tested.
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Type: Term Definitions: 1. the statistical hypothesis that one variable has no association with another variable or set of variables, or that two or more populations do not differ from each other; the statement that results do not differ from those that might be expected by the operation of chance alone; if rejected, it increases confidence in the ...
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http://www.medilexicon.com/medicaldictionary.php?t=43094
1. (statistics) A hypothesis that postulates no underlying difference in the populations or groups being compared with regard to the factor, trait, characteristic, or condition of interest. 2. Null treatment hypothesis.
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(in the statistical testing of a hypothesis) the hypothesis to be tested. Cf.
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https://www.infoplease.com/dictionary/null-hypothesis
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