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statistical power

— In treatment comparisons, the likelihood that a study will be able to record sufficient outcome data to yield a statistically reliable measure of treatment effects

Full explanation:

Statistical power is the probability (likelihood) that a study will detect a "statistically significant" difference of a specified size between the effects of the treatments being compared.

The pre-specified sample size for the study is often chosen in the hope of giving the trial the desired statistical power

See also:

sample size  ·  type I error

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