# statistical significance

(redirected from Significant reduction)

## 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 ?
The results showed a statistically significant reduction of Office blood pressure in the treatment group of -23/-17mmHg and a reduction of 24 hr Ambulatory blood pressure of -12/-13mmHg.
BARCLAYS denied it was planning a significant reduction to its branch network, amid speculation that up to a quarter of its 1,600 sites in the UK could close.
The HOWARU Restore formulation demonstrated effectiveness in reducing the impact of antibiotic associated diarrhea in patients under antibiotic therapy with: a significant reduction of the number of episodes of antibiotic associated diarrhea: a significant reduction in the duration of diarrhea and the number of liquid stools: and a significant reduction of diarrhea-associated symptoms such as fever, bloating and abdominal pain.
Meta-analysis of the non-randomised studies also showed a significant reduction in perinatal mortality (0.
The review did not find a significant reduction in maternal mortality across all studies, but it did find a significant reduction across studies with low risk of bias.
But the Norwegian Colorectal Cancer Prevention trial did find that individuals who actually underwent screening were 60% less likely to die from colorectal cancer than were controls who were not screened--a significant reduction.
Cargill received the Innovation Award in the Technology category for its commercialization of BiOH, a polyols process technology representing a significant reduction in fossil fuel energy demand and major reduction of C[O.
Clean, negatively sorted fiber commodities are created, resulting in a significant reduction in labor costs.
REFLECTIONS: ERISA Section 204(h), as amended by the Economic Growth and Tax Relief Reconciliation Act of 2001, provides that a defined-benefit pension plan may not be amended to provide a significant reduction in the rate of future benefit accrual, unless the plan administrator provides notice describing the reduction to each individual whose benefit is adversely affected and to each employee organization representing these individuals; the plan is subject to an excise tax under Sec.
The application of new test instruments, a new test procedure, and an improved uncertainty analysis has resulted in a significant reduction in the reported uncertainty for transition duration (i.
A significant reduction in excess inventories seems well advanced.
Even in people who did not use the DASH diet, a significant reduction in blood pressure was seen when sodium was reduced.

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