statistical power(redirected from Power (statistics))
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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.
statistical powerprobability that a statistical test will reject a false null hypothesis (i.e. that it will not make a type II error)
a priori power analysis use of the power calculation from pilot study data, to determine main study sample size
post-hoc power analysis use of the power equation from the main study data to determine the power of the study