William L Hunt wrote:
> On Tue, 29 Jun 2004 16:10:43 +0000 (UTC), "Perplexed in Peoria"
>  wrote:
> 
> 
>>"Anon." 
wrote in message
>>news:cbpfed$8kv$1{at}darwin.ediacara.org...
>>
>>>Too much statistics - it simply isn't a distribution in the sense I
>>>would use the term.  The only "frequency
distribution" (in the sense
>>>that I would use the term) would be the tri-nomial distribution with
>>>cell probabilities {p^2, 2p(1-p), (1-p)^2}.
>>
>>Bob, you might check your texts.  According to what I read, you have
>>just described a binomial distribution (with n=2).  The corresponding
>>trinomial distribution would have six cells:
>>
>>( p^2, q^2, r^2, 2pq, 2pr, 2qr) with the constraint that p+q+r=1.
>>
>>
> 
>  Ouch, careless me again! I just retracted my quibble with Bob
> thinking I had confused the terminology binomial expansion and
> binomial distribution and he was correct in saying it was actually a
> tri-nomial distribution. But I should have checked a text first as I
> have just now done.

Phew.  :-)

Your quibbles made me look at my texts more carefully, so all this is 
now much clearer to me too.  I even looked up Wright's original paper. 
Path coefficients - ugh!

Bob

-- 
Bob O'Hara

Dept. of Mathematics and Statistics
P.O. Box 4 (Yliopistonkatu 5)
FIN-00014 University of Helsinki
Finland
Telephone: +358-9-191 23743
Mobile: +358 50 599 0540
Fax:  +358-9-191 22 779
WWW:  http://www.RNI.Helsinki.FI/~boh/
Journal of Negative Results - EEB: http://www.jnr-eeb.org
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