What does statistical power mean?
Definitions for statistical power
sta·tis·ti·cal pow·er
This dictionary definitions page includes all the possible meanings, example usage and translations of the word statistical power.
Wiktionary
statistical powernoun
The probability that a statistical test will reject a false null hypothesis, that is, that it will not make a type II error, producing a false negative.
Wikidata
Statistical power
The power of a statistical test is the probability that the test will reject the null hypothesis when the null hypothesis is false. The power is in general a function of the possible distributions, often determined by a parameter, under the alternative hypothesis. As the power increases, the chances of a Type II error occurring decrease. The probability of a Type II error occurring is referred to as the false negative rate. Therefore power is equal to 1 − β, which is also known as the sensitivity. Power analysis can be used to calculate the minimum sample size required so that one can be reasonably likely to detect an effect of a given size. Power analysis can also be used to calculate the minimum effect size that is likely to be detected in a study using a given sample size. In addition, the concept of power is used to make comparisons between different statistical testing procedures: for example, between a parametric and a nonparametric test of the same hypothesis. There is also the concept of a power function of a test, which is the probability of rejecting the null when the true parameter value equals a given constant.
Numerology
Chaldean Numerology
The numerical value of statistical power in Chaldean Numerology is: 2
Pythagorean Numerology
The numerical value of statistical power in Pythagorean Numerology is: 3
Examples of statistical power in a Sentence
The totality of the data need to be analyzed in order to draw any conclusions from the trial. Anecdotal reports, while encouraging, do not provide the statistical power necessary to determine the safety and efficacy profile of remdesivir as a treatment for Covid-19.
Since the majority of coffee drinkers in our study primarily drank caffeinated coffee, we had better statistical power to detect an association for caffeinated than for decaffeinated coffee drinking.
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"statistical power." Definitions.net. STANDS4 LLC, 2024. Web. 26 Apr. 2024. <https://www.definitions.net/definition/statistical+power>.
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