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st: Shapiro Francia for categorical variable - Royston (1993)
I would like to test that the log of income is normal.
I am familiar with -sfrancia- and -swilk-
But my variable (income) comes in categories 0-5000 5000-10,000 ... More
Patrick Royston "A Toolkit for Testing for Non-Normality in Complete and
Censored Samples" Statistician, Vol. 42, No. 1. (1993), pp. 37-43
Which provides the solution from the theoretical point of view (although
you have to combine the case for groups with the case for the open ended
Do you know whether anybody has implemented Royston's solution in an
I used -findit- but it does not look like it
Thank you in advance.
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