statistical power


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sta·tis·ti·cal pow·er

in Neyman-Pearson hypothesis testing, the probability of rejecting the null hypothesis when it is false; the complement of an error of the second kind.
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Caption: FIGURE 1: Statistical power versus ICD code instances, baseline model.
The Impact of Diagnostic Code Misclassification on Optimizing the Experimental Design of Genetic Association Studies
Third, low statistical power and confounding effects combine to generate sizeable upward bias in detected price impacts and damages (i.e., overstating the magnitude of a price impact and damages).
Event studies in securities litigation: low power, confounding effects, and bias
In comparison, when [rho] [not equal to] 1, longitudinal studies always provide more statistical power than their cross-sectional counterparts.
Power analysis for cross-sectional and longitudinal study designs
Empirical statistical powers were estimated by testing genotypic difference from the unbalanced data simulated with 2 to 5 loci by the Bayesian method by Gibbs sampling.
Empirical statistical power for testing multilocus genotypic effects under unbalanced designs using a Gibbs sampler
Low statistical power contributes to an increased likelihood of making a Type II error (Onwuegbuzie, 2004), thereby causing important findings to be either misreported or not even published.
Evaluating and reporting statistical power in counseling research
To increase the statistical power, if required, more sample size can be used or the level of error a can be increased (Foster, 2001).
Determination of optimum sample size in regression analysis for some hydrologic variables with emphasis on power analysis
Previous studies on the possible association between benzene exposure and lymphoma have been complicated by problems with exposure misclassification, outcome classification, and low statistical power. Vlaanderen et al.
Occupational benzene exposure and lymphoma subtypes
"What makes our results so unique is that we had a very large sample size, and since we combined data across many studies, we had more statistical power to detect associations between cancer and coffee."
DRINKING four or more cups [...]
Via the extension, Algeta emphasized that the statistical power of the trial will be increased to 90%, thereby further raising the likelihood of proving the efficacy of the candidate drug.
Norwegian Algeta to enrol more patients in prostate cancer trial with Alpharadin
Finally, power values were low for both confidence intervals and more studies are needed to improve statistical power.
Confidence Intervals and Hypnosis in the Treatment of Obesity
This study summarizes and analyzes average statistical power and effect sizes in empirical entrepreneurship research.
The power and effects of entrepreneurship research
As it happens, the effect size of interest is a mandatory variable in any a priori calculation of statistical power, along with the expected sample standard deviation (2-4).
How do we assess the clinical relevance of a scientific finding? Is there a clinical relevance index?

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