DistributionBMJ 2009; 338 doi: https://doi.org/10.1136/bmj.b370 (Published 05 February 2009) Cite this as: BMJ 2009;338:b370
- John Fletcher, clinical epidemiologist
- 1BMJ, London WC1H 9JR
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 …