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From: wood@gen-rtx.rtp.dg.com (Tom Wood)
Newsgroups: comp.sys.m88k
Subject: Re: SPEC and GNU C version 2
Message-ID: <1991May25.114548.28672@dg-rtp.dg.com>
Date: 25 May 91 11:45:48 GMT
References: <1991May24.183902.14528@dg-rtp.dg.com>
Sender: usenet@dg-rtp.dg.com (Usenet Administration)
Reply-To: wood@gen-rtx.dg.com (Tom Wood)
Organization: Data General Corporation, Research Triangle Park, NC
Lines: 19

In article <1991May24.183902.14528@dg-rtp.dg.com> I wrote:

> Benchmark Time 1.93.4-0522   1.37.31        Change       Significance
>
>       gcc real   114.3280   120.8500    5.70% +/-  .98%    p < .20
>           user    85.6100    94.0075    9.81% +/-  .30%    p < .001
>           prof   101.6180   109.3180    7.58% +/-  .20%    p < .001

I made a mistake in computing the change (A% +/- B%).  The value B is
supposed to be the expected range of percent change for a significance
of .50 (p == .50).  Instead, the program was using a significance value
of .80.  The same data as above should be:

       gcc real   114.3280   120.8500    5.70% +/- 2.66%    p < .20
           user    85.6100    94.0075    9.81% +/-  .82%    p < .001
           prof   101.6180   109.3180    7.58% +/-  .55%    p < .001
---
			Tom Wood	(919) 248-6067
			Data General, Research Triangle Park, NC
			wood@dg-rtp.dg.com