On 12-Jan-06 mirko sanpietrucci wrote:> Dear R-users,
> I am new to the list and I would like to submit (probably!!!!)
> a stupid question:
>
> I found in a paper a reference to a t-test for the evaluationg the
> difference between the standard deviations of 2 samples.
> This test is performed in the paper but the methodology is not
> explained and any reference is reported.
>
> Does anyone know where I can find references to this test and if it is
> implemented in R?
>
> Thenks in advance for your help,
>
> Mirko
If the paper says that a
1) "t-test"
was used for evaluating the difference between the
2) "standard deviations"
of 2 samples
then I suspect that one or the other of these is a misprint.
To compare standard deviations (more precisely, variances)
you could use a (1)F-test.
Or you would use a t-test to evaluate the difference between
the (2)means of 2 samples.
If it is really obscure what was done, perhaps an appropriate
quotation from the paper would help to ascertain the problem.
Best wishes,
Ted.
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Date: 12-Jan-06 Time: 18:52:31
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