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The Danger of Doing Power Calculations Using Only Descriptive Statistics

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  • Steve Su

    (Covance Pty Ltd, North Ryde, Australia)

Abstract

Power calculations are bread and butter in the daily life of a clinical trial statistician and necessary for the determination of sample sizes in clinical trials. However, the use of descriptive statistics and assumption of Normality in conducting power calculations, while prevalent in practice, is not necessarily correct.

Suggested Citation

  • Steve Su, 2018. "The Danger of Doing Power Calculations Using Only Descriptive Statistics," Biostatistics and Biometrics Open Access Journal, Juniper Publishers Inc., vol. 5(4), pages 113-114, March.
    • Handle: RePEc:adp:jbboaj:v:5:y:2018:i:4:p:113-114
    DOI: 10.19080/BBOAJ.2018.05.555670
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    References listed on IDEAS

    as
    1. Su, Steve, 2007. "Numerical maximum log likelihood estimation for generalized lambda distributions," Computational Statistics & Data Analysis, Elsevier, vol. 51(8), pages 3983-3998, May.
    2. Su, Steve, 2007. "Fitting Single and Mixture of Generalized Lambda Distributions to Data via Discretized and Maximum Likelihood Methods: GLDEX in R," Journal of Statistical Software, Foundation for Open Access Statistics, vol. 21(i09).
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