Statistical notes for clinical researchers: assessing normal distribution (1)

@inproceedings{Kim2012StatisticalNF,
  title={Statistical notes for clinical researchers: assessing normal distribution (1)},
  author={Hae-Young Kim},
  booktitle={Restorative dentistry & endodontics},
  year={2012}
}
Various parametric tests make assumptions of the normal distribution, including t-test, analysis of variance (ANOVA), correlation, and regression. Different from some researcher’s understanding, tests of normality are not for the normality of observed data but for normality of the population distribution of a random characteristic; e.g. assuming normality for the population distribution of the characteristic is reasonable when referring to the observed sample data. Actual distribution of the… CONTINUE READING