# statistical significance

(redirected from Statistically significant)

## sta·tis·ti·cal sig·nif·i·cance

(stă-tis'ti-kăl sig-nif'i-kăns),
Statistical methods allow an estimate to be made of the probability of the observed degree of association between variables, and from this the statistical significance can be expressed, commonly in terms of the p value.

## statistical significance

Etymology: L, status, condition, significare, to signify
an interpretation of statistical data that indicates that an occurrence was probably the result of a causative factor and not simply a chance result. Statistical significance at the 1% level indicates a 1 in 100 probability that a result can be ascribed to chance.

## statistical significance

A term used in statistical analysis when a hypothesis is rejected. As a general rule, the non plus minimum significance level is 5%—i.e., it is said to be significant at the 5% level—which means that when the null hypothesis is true, there is only a 1-in-20 chance of rejecting it.

## statistical significance

Significance Statistics A statement of the probability that an observation represents a true causal relationship and not a chance occurrence; the probability that an event or difference occurred as the result of an intervention–eg, a vaccine, rather than by chance alone; this probability is determined by using statistical tests to evaluate collected data. See Significance.

## sta·tis·ti·cal sig·nif·i·cance

(stă-tis'ti-kăl sig-nif'i-kăns)
Statistical methods that allow an estimate to be made of the probability of the observed degree of association between variables, and from this the statistical significance can be expressed, commonly in terms of the p value.

## statistical significance,

n a difference of such magnitude between two statistics, computed from separate samples, that the probability of the value obtained will not occur by chance alone with significant frequency and hence can be attributed to something other than chance. In modern investigation the generally accepted value for significance must have a probability of occurrence by chance factors equal to or less than five times in 100 (
p < 0.05).="" other="" significance="" levels="" commonly="" used="" are="" as="" follows:="" less="" than="" one="" chance="" in="" 100="">
p > 0.01), less than five chances in 1000 (
p < 0.005),="" and="" less="" than="" one="" chance="" in="" 1000="">
p <>

## statistical

pertaining to or emanating from statistics.

statistical efficiency
between-test comparisons are based on the ratio of sample sizes required for the tests to have equal probabilities of detecting the same false null hypothesis; the more efficient test will have the smaller sample size.
statistical methods
procedures for collecting, classifying, summarizing, analyzing and making conclusions about, data. See also regression (4), path analysis, factor, discriminant analysis.
statistical significance
References in periodicals archive ?
These are the main findings regarding intervention impacts after 3 years: (1) There were no statistically significant differences between intervention and control schools on self-reported student violence or victimization; (2) There were no statistically significant program impacts on violence or victimization for students who were at risk for engaging in violence but who had not previously done so; (3) There were no statistically significant program impacts on violence or victimization for high-risk students who had previously engaged in violence; and (4) There were no statistically significant impacts on either secondary or intermediate outcomes.
There was no statistically significant difference regarding the other three questions.
Although the associations between AGD and the secondary DEHP metabolites [mono-2-ethyl-5-oxohexyl phthalate (MEOHP) and mono-2ethyl-5-hydroxyhexyl phthalate (MEHHP)] were suggestive, they were not statistically significant, and the metabolite MEHP appeared to be unrelated to AGI.
The study results showed clinical safety, and that the TRC treatment sites all exhibited bone growth that was statistically significant and had the desired initial integration with preexisting bone.
From November 2004 to November 2005, employment rose by a statistically significant amount in 28 states and DC and fell by a statistically significant amount in Louisiana (-205,000), Michigan (-35,000), and Mississippi (-24,000); in the other 21 states, the change was not significantly different from zero, up or down.
1); the difference between the information-based group and the controls was not statistically significant.
However, Boeing study researchers downplayed the increase in leukemia and lung cancer, calling them ``not statistically significant.
0042); although the difference in early pain scores is statistically significant, it is probably not clinically significant.
No statistically significant difference between cases and controls was detected.
A small (40-patient) randomized trial in patients on HAART with peripheral neuropathy showed a statistically significant increase in CD4 (T-cell) counts over 12 weeks.
All statistically significant changes are not necessarily clinically significant.

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