How would you calculate the standard deviation of a ratio?
i.e. We have:
Nt � SD (population at time t; mean � SD)
N0 � SD (population at time 0; mean � SD)
Survival ratio at time t = Nt/N0
Is there any way to have a confidence interval on the ratio?
This is a standard measurement in microbiology but
none seems to address its statistical validity. Any ideas?
Thanks!
... Raghu
[EMAIL PROTECTED]
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