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Endgames Statistical question


BMJ 2009; 338 doi: (Published 05 February 2009) Cite this as: BMJ 2009;338:b370
  1. John Fletcher, clinical epidemiologist
  1. 1BMJ, London WC1H 9JR
  1. jfletcher{at}

    If a statistician tells you that your data are not normally distributed and the distribution has “fat tails,” which if any of the following will be true?

    • a) Extreme values may be more frequent than in a normal distribution

    • b) 95% confidence intervals cannot be computed

    • c) Parametric statistics cannot be used

    • d) 95% confidence intervals …

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