In article <[EMAIL PROTECTED]>,
Peter Lewycky <[EMAIL PROTECTED]> wrote:
> I've often been called upon to do a t-test with 5 animals in one group
> and 4 animals in the other. The power is abysmally low and rarely do I
> get a p less than 0.05. One of the difficulties that medical
researcher
> have is with the notion of power and concomitant sample size. I make
it
> a point of calculating power especially where Ho has not been
rejected.
> It gives the researcher some comfort in that his therapy may indeed be
> effective. All he needs for 0.8 power is 28,141 rats per group.
<grin>
This has got to be one of the funniest things I have read on a stats
newsgroup. I'm sure its not really meant to be funny, but the thought
of truckloads upon truckload of rats arriving to satisfy power
requirements puts a highly amusing spin on the whole thing. :)
I am stifling an insane cackle because I know statistics is a serious
business but really....
Cheers,
Chris
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