Estimate one-sample or two-sample power from standardized effect size, sample size and alpha using a transparent normal approximation.
Estimate one-sample or two-sample power from standardized effect size, sample size and alpha using a transparent normal approximation.
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No. Review effect size, confidence intervals, study design, assumptions, sampling and multiplicity together with the p-value.
No. This version uses a transparent normal approximation to standardized mean-difference power. It is useful for planning and sensitivity checks; confirm preregistered or regulatory analyses with dedicated validated software.
