Normal Plot


Menu location: Graphics_Normal


This function plots the data of a sample against their normal scores. A random sample from a normal distribution will form a near straight line plot. Normal plots are used to investigate distributions of data in this way.


Three methods are provided for the calculation of normal scores; van der Waerden; Blom; or expected normal order - see normal scores for details of the calculations.


You may wish to use the Shapiro-Wilk W test (listed under parametric methods) as a more quantitative assessment of (non-)normality.




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