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- Posted-Date: Thu, 17 Dec 92 11:36:50 EST
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- Message-ID: <9212171636.AA09761@mail.sas.upenn.edu>
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- Date: Thu, 17 Dec 1992 11:36:50 EST
- Sender: STATISTICAL CONSULTING <STAT-L@MCGILL1.BITNET>
- From: Evan Cooch <ecooch@SAS.UPENN.EDU>
- Subject: Re: diff of means
- In-Reply-To: <9212171600.AA25472@ stat.uiowa.edu>; from "Russ Lenth" at Dec 17,
- 92 10:00 am
- Lines: 14
-
- Whoops...uploading the file I submitted seems to have screwed something
- up. As someone has quickly pointed out to me, the SE of a mean is the STD
- of the sampling distribution, not the VARIANCE. The superscript 2's were
- stripped off somehow during the upload (asnd of course I didn't check for
- such gremlins).
-
- The expression should have been
-
- Var(mu1-mu2) = SE(1)^2 + SE(2)^2
-
- (Thanks Russ!)
-
-
- Evan Cooch
-