[R] Calculation of standard error for a function
rolf.turner at xtra.co.nz
Sat Mar 3 01:55:53 CET 2012
On 03/03/12 13:35, David Winsemius wrote:
> On Mar 2, 2012, at 7:05 PM, Duncan Murdoch wrote:
>> On 12-03-02 4:47 PM, Jun Shen wrote:
>>> Dear list,
>>> If I know the standard error for k1 and k2, is there anything I can
>>> call in
>>> R to calculate the standard error of k1/k2? Thanks.
>> No, because it depends on the joint distribution of k1 and k2. Even
>> if you knew they were independent, that would not be sufficient
>> (though you could use the delta method to get an approximation in
>> that case; look it up).
> A nice article with useful information on three approaches to this
> problem appeared in BMC Medical Research Methodoogy:
> "Methods for confidence interval estimation of a ratio parameter with
> application to location quotients", by Beyene and Moineddin.
Chapter 6 of "Beyond Anova" by Rupert G. Miller, Chapman & Hall, 1997,
be of interest.
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