topic Re: Test of Normaldistribution using Kolmogorov-Smirnoff und Shapiro Wilk in SAS Programming

Test of Normaldistribution using Kolmogorov-Smirnoff und Shapiro Wilk

Anita_n — Tue, 27 Apr 2021 10:45:27 GMT

Hello all,

Am tring to use proc capability to do a test of normal distribution. But since this procedure is very new to me, I will be grateful for any help. Here is my code

proc capability data=sashelp.heart normaltest; 
*CHECKINDICES(test=SW );
var agechddiag;
run;

I only wish to output the Shapiro-Wilk (SW), Kolmogorov-Smirnov (KS) test. I taught I could use the

CHECKINDICES(test=SW|KS) statements as stated in the sas documentation but I still get all tables outputted. I only need the table with the Normaldistribution.

My second question is how can I output this as a sas table. I used output out= myoutdata but I got 0 observations outputted.

Re: Test of Normaldistribution using Kolmogorov-Smirnoff und Shapiro Wilk

PaigeMiller — Tue, 27 Apr 2021 10:59:05 GMT

I don't know why you get all tests when you use CHECKINDICES

ods output testsfornormality=tests;

This outputs all tests of normality to data set TESTS. If you don't want certain ones, then you can delete the ones you don't want.

Re: Test of Normaldistribution using Kolmogorov-Smirnoff und Shapiro Wilk

Rick_SAS — Tue, 27 Apr 2021 11:13:23 GMT

To test the normality of a variable in the data set, use the NORMALTEST option. You will get a table that contains four statistics, including the KS.

In addition, the CHECKINDICES option will output a message such as

Warning: Normality is rejected for alpha = 0.05 using the Shapiro-Wilk test

proc capability data=sashelp.heart normaltest CHECKINDICES(test=SW );
var agechddiag;
specs lsl=40 usl=90;
run;

Re: Test of Normaldistribution using Kolmogorov-Smirnoff und Shapiro Wilk

Anita_n — Tue, 27 Apr 2021 11:50:09 GMT

@Rick_SAS @PaigeMiller Thankyou. Its working perfectly