[R] Fisher test problem

[markleeds at verizon.net]

  Thanks berwin. See what I sent to Ben. I better start looking up my 
stat textbooks or going back to class before I start using stat terms. 
You guys are on top of things !!!!.



On Sat, Mar 21, 2009 at 10:50 PM, Berwin A Turlach wrote:

> G'day Mark,
>
> On Sat, 21 Mar 2009 22:08:21 -0500 (CDT)
> markleeds at verizon.net wrote:
>
>>   by definition, the one tailed p-value has to be <= 0.5
>
> Can you point me to such a definition?  I was not aware that this is
> the case. :)
>
> And your example:
>
>> A) Suppose you are testing
>>
>>                                 Ho: u = u_0
>>                                 H1 u > u_0
>>
>> and your t-stat was  -0.3 Then prob( T > t_0) = 0.62  so your pvalue 
>> would be 0.62.
>
> seems to contradict your statement.  A one sided-test, hence a
> one-tailed p-value, which yields a p-value larger than 0.5.
>
> But, perhaps, we are just using different terminology.
>
> Cheers,
>
> 	Berwin