topic Re: Manually estimate KS statistic in SAS Programming

Manually estimate KS statistic

Toni2 — Wed, 04 May 2022 06:47:52 GMT

hi i use the proc npar1way with the edf option to produce the KS statistic.

My aim is using KS to understand if sample (smp) is different from the population (pop).

When i run the proc npar1way i get the below KS :

Kolmogorov-Smirnov Two-Sample Test
(Asymptotic)
KS	0.066667	D	0.133333
KSa	0.516398	Pr > KSa	0.9525

My question is: is there any easy way to estimate KS manually in SAS in order to understand better the above outcome?

data final;
set smp (obs=30) pop (obs=30);
run;

proc sort data=final;
by application_score;
run;


ods graphics on;
proc npar1way edf plots=edfplot data=final;
class source;
var application_score;
/*exact ks;*/
run;
ods graphics off;

Re: Manually estimate KS statistic

Ksharp — Wed, 04 May 2022 10:15:00 GMT

Maybe @Rick_SAS could give you a hand.

Here is an example:

https://blogs.sas.com/content/iml/2019/05/15/kolmogorov-d-statistic.html

https://blogs.sas.com/content/iml/2019/05/20/critical-values-kolmogorov-test.html

https://blogs.sas.com/content/iml/2020/06/24/kolmogorov-d-distribution-exact.html

Re: Manually estimate KS statistic

Toni2 — Wed, 04 May 2022 13:10:27 GMT

thanks