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Home Statistical Tests Comparing Distributions Test for Normality  
See also: Normal Distribution, ChiSquare Test, KolmogorovSmirnov test, ShapiroWilk Test  
Test for NormalityThe test for normality is a commonly needed procedure, since many of the statistical procedures are assumed to be applied to normally distributed data. In general, the test for normality can be achieved by applying a goodnessoffit method (i.e. chisquare test, or KolmogorovSmirnov test). These two tests, however, do not perform well (the power of these tests is not too high). Therefore some other tests have been developed, which have various advantages but also some drawbacks: the power of the ShapiroWilk test is good, but the calculation procedure is rather cumbersome. A comparison of various tests for normality is given in the book of D'Agostino and M.A. Stephens. The following table provides a survey on the most common tests for comparing distributions. All but the ShapiroWilk test can also be used to test for distributions other than the normal distribution.


Home Statistical Tests Comparing Distributions Test for Normality 