Statalist The Stata Listserver

[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: Re: permute

From   "Paul Fenner" <>
Subject   st: Re: permute
Date   Sun, 09 Jul 2006 15:30:26 +0000

I often have to analyse small datasets and I normally use StatXact. I no longer have access to this program so I thought that I would use permute as an option. When I use the ranksum test I get reasonable agrrement between the probablities from StatXact and permute (e.g. asymptotic p=0.0749, permute p=0.0789 and StatXact p=0.0794). However when I use signrank I get no agreement at all e.g. asymptotic p 0.0431, permute p=1.00, StatXact p=0.0079). The code I am using is:
permute diff z=r(z), reps(10000) nowarn: signrank diff=0

Could somebody tell me if my code is in error, or am I entirley incorrect in using permute for exact calculations on small numbers.
Many thanks.

Windows Live™ Messenger has arrived. Click here to download it for free!

* For searches and help try:

© Copyright 1996–2021 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index