Preferred Label : Null Hypothesis;
NCIt definition : A statistical method to test if observations are significant or due to chance. It
proposes that no statistical significance exists in a set of given observations and
attempts to show that no variation exists between variables or that a single variable
is no different than its mean. It is presumed to be true until statistical evidence
nullifies it for an alternative hypothesis.;
Alternative definition : CDISC-GLOSS: The assertion that no true association or difference in the study outcome
or comparison of interest between comparison groups exists in the larger population
from which the study samples are obtained. NOTE: A null hypothesis (for example, subjects
will experience no change in blood pressure as a result of administration of the test
product) is used to rule out every possibility except the one the researcher is trying
to prove, and is used because most statistical methods are less able to prove something
true than to provide strong evidence that it is false. The assertion that no true
association or difference in the study outcome or comparison of interest between comparison
groups exists in the larger population from which the study samples are obtained.
See also research hypothesis. [from AMA Manual of Style];
NCI Metathesaurus CUI : CL540537;
Origin ID : C142616;
UMLS CUI : C4684719;
Semantic type(s)
- concept_is_in_subset
