Hi, xiechao
i don't think that is a R specific problem. you mean u got two
random variables X,Y and both
of them binomial distributed and you want to find the distribution of
a new variable Z = X/Y.
That is a basic transformation problem. u can start with introducing a
new r.v. namely W, by
letting it equal to X you obtain W=X,Z=X/Y from which u have X = W
and Y = W / Z. It is easy
to find the Jacobian of this transformation, and the left is routinely.
regards.
On 2008-6-27, at 下午8:29, Xie Chao wrote:
Hi all,
I am a biological student and need your help in statistics.
I have two sets of binomial distributed numbers: {a1, a2, ..., an}
and {b1,
b2, ..., bn}.
How can I get the distribution of the ratios of the two sets of
numbers
{a1/b1, a2/b2, ..., an/bn}? Is there a formula to transform the
distributions? Or where I can start if I want to learn necessary
techniques?
Thank you a lot!
xiechao
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-----------------------------------------------
Peng Jiang
江鹏
Ph.D. Candidate
Antai College of Economics & Management
安泰经济管理学院
Department of Mathematics
数学系
Shanghai Jiaotong University (Minhang Campus)
800 Dongchuan Road
200240 Shanghai
P. R. China
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