感觉答案是错的,多算了一部分钱感觉像是
做过的求助一下?
Annual prescription drug costs are modeled by a two-paramete r Pareto distribution with
θ =2000 and α = 2 .
A prescription drug plan pays annual drug costs for an insured member subject to the
following provisions:
(i) The insured pays 100% of costs up to the ordinary annual deductible of 250.
(ii) The insured then pays 25% of the costs between 250 and 2250.
(iii) The insured pays 100% of the costs a bove 2250 until the insured has paid 3600 in
total.
(iv) The insured then pays 5% of the remaining costs.
Determine the expected annual plan payment.
答案用0.75(E(X^2250)-E(X^250)+0.25(E(X)-E(X^5100))
但是这个式子的第一项从2250之后不是还会按S(2250)概率付出0.75*2000的钱吗,按道理是不是要扣掉,即减去S(2250)*0.75*2000 ?


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