作者junjohn (why so serious)
看板Statistics
標題[問題]三個統計問題請高手指點
時間Sun Apr 10 17:28:35 2011
1.Let Y=N-X where X has a binomial distribution with parameters N and p.
Evaluate the product moment E[XY] and the covariance Cov[XY].
2.Determine the upper tail probabilities Pr{V>t} and mean E[V] for
a random variable V having the exponential density
fv(ν)={0,λe(-λν)
forν<0, forν>=0
3.Suppose that X has a binomial distribution with parameters p=1/2 and N,
where N is also random and follows a binomial distribution with
parameters q=1/4 and M=20. what is the mean of X.
各位統計高手，小弟統計功力不強，和同學討論隨機過程題目中，有這三題問題不解
如果有高手能夠指點迷津將感激不盡!!!
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1F：→ bmka:這裡不是作業解答版,請告訴大家你解題卡在哪裡 04/10 23:21