R help - Mar 2010 - Levene's Test for Homogeneity of Variance

Hi, All!

To calculate Levene's Test for Homogeneity of Variance I use R Commander,
and this is the output:
> levene.test(Dataset$age, Dataset$sex)
Levene's Test for Homogeneity of Variance
      Df F value Pr(>F)
group  1  0.8739 0.3567
      33

I am not sure what means "Pr(>F)"? Can anyone explain/translate
this?


Regards,
Iurie Malai
Department of Psychology and Special Education
Moldova Pedagogical State University

iurie.malai@gmail.com

	[[alternative HTML version deleted]]

On 21 March 2010 13:13, Iurie Malai <iurie.malai at gmail.com>
wrote:
> To calculate Levene's Test for Homogeneity of Variance I use R
Commander,
> and this is the output:
>
>> levene.test(Dataset$age, Dataset$sex)
> Levene's Test for Homogeneity of Variance
> ? ? ?Df F value Pr(>F)
> group ?1 ?0.8739 0.3567
> ? ? ?33
>
> I am not sure what means "Pr(>F)"? Can anyone
explain/translate this?

this is shorthand for:
> 1 - pf(0.8739, 1 ,33)
[1] 0.3567

see:
?pf

Philippe

Dear Iurie,

"Pr(>F)" is the p-value for the test of the null hypotheses that
the
population variances are equal. This is the typical format for labelling a
p-value in R output.

I hope this helps,
 John

--------------------------------
John Fox
Senator William McMaster 
  Professor of Social Statistics
Department of Sociology
McMaster University
Hamilton, Ontario, Canada
web: socserv.mcmaster.ca/jfox

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at
r-project.org]
On
> Behalf Of Iurie Malai
> Sent: March-21-10 8:14 AM
> To: r-help at r-project.org
> Subject: [R] Levene's Test for Homogeneity of Variance
> 
> Hi, All!
> 
> To calculate Levene's Test for Homogeneity of Variance I use R
Commander,
> and this is the output:
> 
> > levene.test(Dataset$age, Dataset$sex)
> Levene's Test for Homogeneity of Variance
>       Df F value Pr(>F)
> group  1  0.8739 0.3567
>       33
> 
> I am not sure what means "Pr(>F)"? Can anyone
explain/translate this?
> 
> 
> Regards,
> Iurie Malai
> Department of Psychology and Special Education
> Moldova Pedagogical State University
> 
> iurie.malai at gmail.com
> 
> 	[[alternative HTML version deleted]]
> 
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