Dear All,
I have a probability question that may seem easy (and, quite
possibly is) but is causing me some brain ache.
I have two groups. I am measuring calcium on them and they
form two normal distributions. Now if I take a calcium reading
at random from the population, what is the probability that
the person is from group A?
The person can only be in group A or group B, but not both as
the groups are mutually exclusive.
Im guessing if this involves likelihood ratios that I can
extend this to the bivariate normal distribution which is my
eventual aim.
Thanks for your time
Paul Wicks
Statistician
South Manchester University Hospitals Trust
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