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Tukey HSD Quantile in JMP

I am giving same command in SAS and JMP but getting different results.
This is to find Tukey HSD quantile.

BASE SAS command: Output
qa = probmc("range", . , 0.95, 2, 2); 6.0848698
qb = probmc("range", . , 0.95, 20, 6); 4.4452367

JMP scripting command (JSL)
qa = Tukey HSD Quantile(0.95, 2, 2); 4.30264639
qb = Tukey HSD Quantile(0.95, 6, 20); 3.14325822

Can someone tell about this?
2 REPLIES
mpb

Super User

Joined:

Jun 23, 2011

The JMP Tukey HSD Quantile is the SAS probmc / sqrt(2).
It is the same as the q* shown when you choose Tukey HSD in Fit Y by X.
For example 4.30264639 = 6.0848698 / sqrt(2).
bckim1

Community Member

Joined:

Apr 28, 2015

why we have to devided by sqrt(2)? which one is correct?