Smaple 1 类似 但是题目更难一些

有加入条件机率 基本上重点就是把图画出来(三个圈圈) 就解得出来

没用图解的话 可能不好解出 因为题目有些条件根本就用不到

Sample 5

Sample 7

Sample 9

Sample 12

Sample 19

Sample 28

A hospital receives 10% of its flu vaccine shipments from Company X and the remainder of its shipments from other companies

Each shipment contains a very large number of vaccine vials.For Company X’s shipments, f(x<30%) of the vials are ineffective. For every other company,

f(x<20%) of the vials are ineffective. X.Y all exponentially distribution θ=10

The hospital tests 30 randomly selected vials from a shipment and finds that one vial is ineffective.

What is the probability that this shipment came from Company X?

Sample 34

The lifetime of a machine part has a continuous distribution on the interval (0, 40)

with probability density function f, where f (x) is proportional to x/ (1 + x^2).^2.

Calculate the variance of t the lifetime of the machine.

Sample 50

Sample 77 78 79

Sample 95

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Sample 151

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f(X.Y)=x(1+y)^2 0<x<5 1<y<10

问题

E[X]和E[Y]的关系 及 Var[X]和Var[y]关系 (大于 小于 或 等于)

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Normally approximate

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Loss 范围

30% 3<x<5

20% 4<x<6

10% 6<x<8

问4<x<5 加上7<x<8 loss的大小

知道这个题目就可以解了(只是英文看不懂)

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X is possion distribution λ=3

在x至少要大于等于1的情况下

问var[x]

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Profit

1005001000

Store1 0.90.020.08

Store2 0.050.30.65

Store3 0.5 0.4 0.1

X=profit

问standard deviation of x

#骰子 扑克牌 问题完全没考(可能是旧题型 现在都不考了)

我准备的方向是用guo的书

主要练习

1.sample

2.EXAM P QUESTIONS OF THE WEEK S. Broverman, 2007

3.SOA EXAM P TIA的 4套题目

Sample 大约看了三遍以上 完全了解

然后才开始做 其他的套题

其他套题都只写了一遍 把不懂的都弄懂 就去考试了

太难的题目基本上我自己就是直接跳过

当然要考到十级分的人不可以学我这样偷懒 哈

基本上还是sample一定要熟 要真的都懂

而做题目的量其实不用多 最主要是要完全了解

p.s.考试准备的资料 我免费上传给大家