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摩根斯坦筆試題

時間:2024-11-12 13:11:35 資料大全 我要投稿
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摩根斯坦筆試題

摩根斯坦利數(shù)學題

摩根斯坦筆試題


1. X is a uniform distribution random variable between [0,1], Y=Ln(x).

What i
s the range of values Y can take, and Y's probability distribution

function.


2. X and Y are independent normal distribution random variables with mean

0 a
nd standard deviation 1. Prove that Z=X+Y is also a normal distribution

rando
m variable. What's Z's mean and standard deviation? What's the correlation

co
efficience between X and Z.


3. A binary random variable is a random variable that takes only 2 values

0 a
nd 1. A and B are binary random vriables with
Probability(A=1) = 0.3
Probability(B=1) = 0.5
What is the min and max correlation between A and B.


4. Find all solutions to the following ordinary differetial equations.
f(x)''+2f(x)'+f(x)=2.
 

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