用于性格测评的卡特尔16PF测评系统及分析说明

O(∩_∩)O哈哈~  当今社会的确是以穷了不行啊、、

慢慢挣钱咯。。。

好东西啊 顶顶顶

这个不错。。。

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.
本文来自: 人大经济论坛 详细出处参考：http://www.pinggu.org/bbs/viewthread.php?tid=720877&page=1

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.
本文来自: 人大经济论坛 详细出处参考：http://www.pinggu.org/bbs/viewthread.php?tid=720877&page=1

10# jessie1010

没钱看哦

有用吗??  收这么多钱...

看看我的币子够不，这应该是个好东西