[R] variance of combinations of means - off topic
Spencer Graves
spencer.graves at pdf.com
Wed Jan 5 20:21:06 CET 2005
Hi, Andy:
MASS4 has section 5.7 "Bootstrap and Permutation Methods". Is
this what you are suggesting? It certainly is relevant to the question
(but not to the "delta method", except as a means of checking on it).
Thanks,
spencer graves
Liaw, Andy wrote:
>You could try googling for "delta method". I believe MASS even has code for
>that...
>
>Andy
>
>
>
>>From: Bill Shipley
>>
>>Hello, and please excuse this off-topic question, but I have not been
>>able to find an answer elsewhere. Consider a value Z that is
>>calculated
>>using the product (or ratio) of two means X_mean and Y_mean:
>>Z=X_mean*Y_mean. More generally, Z=f(X_mean, Y_mean). The standard
>>error of Z will be a function of the standard errors of the means of X
>>and Y. I want to calculate this se of Z. Can someone direct me to a
>>reference (text book or other) that gives the solution to
>>this *general*
>>problem?
>>
>>Thanks.
>>
>>
>>
>>Bill Shipley
>>
>>
>>
>>
>> [[alternative HTML version deleted]]
>>
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>
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