Lapis Lazuli | Level 10

## KS vs D. Which one to use?

i have more than 100 variables and use npar1way to estimate KS.

My aim is each variable to be tested based on the class variable

``````proc npar1way edf data=mydata noprint;
class source;
var &val;
output out=stat ks;
run;``````

Below is an example of the outcome for one variable. My question is, do i need to use the KS or the D statistic?

 Kolmogorov-Smirnov Two-Sample Test (Asymptotic) KS 0.038621 D 0.1039 KSa 1.07377 Pr > KSa 0.1991

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Accepted Solutions
Diamond | Level 26

## Re: KS vs D. Which one to use?

For comparing two different distributions, look at the graphic at Wikipedia, D is the size vertically of the black arrow, it is the maximum vertical difference between the two distribution. That's the one you want.

The documentation explains the difference: https://documentation.sas.com/doc/en/pgmsascdc/9.4_3.4/statug/statug_npar1way_details24.htm

--
Paige Miller
2 REPLIES 2
Diamond | Level 26

## Re: KS vs D. Which one to use?

For comparing two different distributions, look at the graphic at Wikipedia, D is the size vertically of the black arrow, it is the maximum vertical difference between the two distribution. That's the one you want.

The documentation explains the difference: https://documentation.sas.com/doc/en/pgmsascdc/9.4_3.4/statug/statug_npar1way_details24.htm

--
Paige Miller
Lapis Lazuli | Level 10

## Re: KS vs D. Which one to use?

thank you 🙂
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