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Rudolph:
I'm not positive. According to the Excel online help, you can compare data
with 2 different variances. At this time I don't have or can find any
statistics books in my library. I have found that for my limited
applications, the Excel statistics package more than meets my needs.
History of the t test. This was developed around 1900 by a Br. statistician
who worked for Guinness. They only allowed him to publish his results under
a pseudonym. They felt that they had an edge in their quality control and
didn't want to alert the competition.
Lionel Issen
lissen@xxxxxxxxx
----- Original Message -----
From: rudolf stricker <lists@xxxxxxxxxxx>
To: <metastock@xxxxxxxxxxxxx>
Sent: Friday, April 21, 2000 12:14 PM
Subject: Re: Significance of Statistics in System Testing
>
> Lionel,
>
> On Tue, 18 Apr 2000 10:50:25 -0500, you wrote:
>
> >Just one comment.
> >There is a statistical test called, I think, Student's t test.
> >What this test does is tell you if you have enough data and indicates how
> >much more data you need.
>
> Isn't this student test based on a special (symmetrical ?) probability
> distribution? If so, it might lead to more reliable results, if we use
> e.g. Weibull's distribution and the accompanying numerics to calculate
> appropriate confidence boundaries.
>
> mfg rudolf stricker
> | Disclaimer: The views of this user are strictly his own.
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