[R] Levene's test output
Rui Barradas
ruipbarradas at sapo.pt
Fri Jun 21 13:11:45 CEST 2013
Hello,
The Pr(>F) is a regular p-value, with the usual meaning.
Rui Barradas
Em 21-06-2013 11:05, pieter escreveu:
> k.
> Thanks.
> Sorry i'm not the biggest statician, but I still find the output write
> out not the clearest of all. Anyway, that is probably a personal
> problem. :-)
>
> Just one question. the Pr(>F) is just the regular p value, right? so
> above the treshold means equal variance?
>
> Thanks alot.
>
> Pieter
>
> On vr 21 jun 2013 11:56:06 CEST, Rui Barradas wrote:
>> Hello,
>>
>> You need to know what is the Levene test, that output is as clear as
>> water. 75 + 283 == 358. Minus two groups gives 356.
>> See
>>
>> http://en.wikipedia.org/wiki/Levene%27s_test
>>
>> Hope this helps,
>>
>> Rui Barradas
>>
>> Em 21-06-2013 09:12, pieter escreveu:
>>> Hey,
>>> I don't really get the output of the performed Levene's test.
>>> So in short.
>>> two data sets, one with 75 elements, one with 283.
>>> And I want to check whether they have the same variance.
>>>
>>> I did a LeveneTest
>>> And this is the output:
>>>
>>> Levene's Test for Homogeneity of Variance (center = median)
>>> Df F value Pr(>F)
>>> group 1 10.948 0.001033 **
>>> 356
>>> ---
>>> Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
>>>
>>> So I would think that H0 is being rejected? for everything except 99.9%?
>>> But what does the 356 mean?
>>> Is this test performed correctly? group is a vector with 1's and 2's
>>> appointing the two datasets...
>>>
>>>
>>>
>>> [[alternative HTML version deleted]]
>>>
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