# statistical significance

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## 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

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.
References in periodicals archive ?
Thus, to distinguish between the importance or practical significance of the findings and their statistical significance, the term "statistically significant" should be used to describe the results linked to a value of p< alpha (Cumming, 2012; Frias-Navarro, Pascual-Llobel, & Garcia-Perez, 2000; Gliner et al., 2001; Kline, 2013; Monterde-i-Bort, Frias-Navarro, & Pascual-Llobel, 2010; Thompson, 1996).
To ensure an even smaller chance of having a Type I error, the statistical significance test can be set at 0.01.
Major finding: After 3 years on cholinesterase inhibitors, patients with mild Alzheimer's disease had a mean decline of 6.1 points on the Alzheimer's Disease Assessment Scale-Cognitive subscale, while those with moderate Alzheimer's had a mean decline of 13.2 points, a difference that reached statistical significance (P less than .001).
Confidence interval (CI) is considered reciprocal to statistical significance. That is p less than 0.05 is the same as having a 95% CI that does not overlap zero.
When asked, how does this advance Bible Code, James stated "Because, it is now possible to determine statistical significance, so we can now say, 'Wow, that keyword is really statistically significant or, O.K.
However, in the new 2009 edition of the APA Publication Manual, a more detailed analysis of the polemic of statistical significance contrasts was included and a more energetic recommendation was made about the obligatory use of the effect size in the journals of its influence, specifically: "However, complete reporting of all tested hypotheses and estimates of appropriate effect sizes and confidence intervals are the minimum expectations for all APA journals.
This mathematical concept illustrates that the likelihood of finding statistical significance (i.e., rejecting the null hypothesis) increases with larger sample sizes, and the likelihood of failing to find statistical significance increases with smaller sample sizes (i.e., retaining the null hypothesis).
The results imply (at the 5% statistical significance level or beyond) that the bank failure rate was positively affected by the cost of funds and stock market volatility and negatively impacted by the FDIC Act of 1991.
The Cult of Statistical Significance: How the Standard Error Costs Us Jobs, Justice, and Lives.
The relationship with both RA and lupus was statistically significant for children with Crohn's, while not quite reaching statistical significance for those with ulcerative colitis, Dr.

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