Moments
Skewness and kurtosis are two of the first four moments of a normal distribution. Both can be used to test the assumption of normality of a data distribution, although they are less widely used than other contrast pr graphical methods.
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Evidence Based Medicine pills
Tag normality
A picture is worth a thousand words
There are three possible strategies o verify that a variable follows a normal distribution: methods based on hypothesis testing, those based on graphical representations and the so-called analytical methods.
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Regression model diagnostics. Once we obtain the simple linear regression model, we have to proceed to its validation and to the diagnosis of the model. The first case consists of checking that the coefficients are statistically significant. The second is…