Re: [R] i need help for var.test()
On Jan 8, 2015, at 5:12 AM, sait k sa...@hotmail.de wrote: Dear Sir or Madam, i want to use the var.test() (f.test()) for n samples. But in R the var.test() can only used for variances of two samples. In the intruductions stands: Performs an F test to compare the variances of two samples from normal populations. I need a variance test for n samples. It will be great, if you tell me the which test i can use in R for this problem. Thank you for the help. Yours sincerely, Sait Polat You can take a look at ?bartlett.test (which is listed in the See Also section of ?var.test) or perhaps ?fligner.test for a non-parametric method. Regards, Marc Schwartz __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] i need help for var.test()
Hello, Sait, take, for example, a look at bartlett.test(), but keep in mind that Bartlett's test is quite sensitive to deviations from normality. Levene's test (e.g., in leveneTest() in package car) is said to be more robust. Hth -- Gerrit On Thu, 8 Jan 2015, sait k wrote: Dear Sir or Madam, i want to use the var.test() (f.test()) for n samples. But in R the var.test() can only used for variances of two samples. In the intruductions stands: Performs an F test to compare the variances of two samples from normal populations. I need a variance test for n samples. It will be great, if you tell me the which test i can use in R for this problem. Thank you for the help. Yours sincerely, Sait Polat [[alternative HTML version deleted]] __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] i need help for var.test()
See also the levene test from the car package, and for a single outlying
variance see the cochran test from the outliers package.
From: R-help [r-help-boun...@r-project.org] On Behalf Of sait k
[sa...@hotmail.de]
Sent: 08 January 2015 11:12
To: r-h...@lists.r-project.org
Subject: [R] i need help for var.test()
Dear Sir or Madam,
i want to use the var.test() (f.test()) for n samples.
But in R the var.test() can only used for variances of two samples. In the
intruductions stands: Performs an F test to compare the variances of two
samples from normal populations.
I need a variance test for n samples. It will be great, if you tell me the
which test i can use in R for this problem.
Thank you for the help.
Yours sincerely,
Sait Polat
[[alternative HTML version deleted]]
__
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and provide commented, minimal, self-contained, reproducible code.
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