Transcription of Syntax - Stata
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Syntax - Stata
Skewness and kurtosis test for normalitySyntaxMenuDescriptionOptionRema rks and examplesStored resultsMethods and formulasAcknowledgmentsReferencesAlso seeSyntaxsktestvarlist[if] [in] [weight] [, noadjust]aweights andfweights are allowed; see[U] >Summaries, tables, and tests>Distributional plots and tests>Skewness and kurtosis normality testDescriptionFor each variable invarlist,sktestpresents a test for normality based on skewness and anotherbased on kurtosis and then combines the two tests into an overall test aminimum of 8 observations to make its calculations. See [MV]mvtest normalityfor multivariatetests of Main noadjustsuppresses the empirical adjustment made by Royston (1991c) to the overall 2andits significance level and presents the unaltered test as described by D Agostino, Belanger, andD Agostino (1990).Remarks and see [R]swilkfor the shapiro wilk and Shapiro Francia tests for normality.
The relative merits of the skewness and kurtosis test versus the Shapiro–Wilk and Shapiro–Francia tests have been a subject of debate. The interested reader is directed to the articles in the Stata Technical Bulletin. Our recommendation is to use the Shapiro–Francia test whenever possible, that is, whenever
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