ati sundar wrote:> Hello All
>
> I am new to this list. I have a problem where for a single sample drawn
from normal population, null hypothesis is that variance = k (say).
Perhaps you want to tell us more precisely what you are going to do
rather than asking the same inprecise question again and again
(including messages to single persons on the list).
Is k fixed or the variance? What are your data? Specify a valid Null /
Alternative combination. If you Null is variance = k (say) then you
alternative is variance != k or if the alternative is variance > k, then
your null is probably variance <= k
Uwe Ligges
Alternative hypothesis is variance > k. Now if we know the true
variance, then I would like to calculate the sample size required to
produce certain power (for some> significance). How do I do this ? I thought of using pwr.chisq.test, and I
contacted the author stephane champely, but he said his package can't do
this. Does anybody have an idea ?
>
> Thanks
> Ati
>
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