Mathematical Expectation
7 important questions on Mathematical Expectation
If a and b aare constants then: E(aX+b) =
What is the rth moment about the mean
What is the standard variation?
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If X and Y are independent then
State Chebyshev's Theorem
1-1/k^2 (at least)
- Calculate the mean
- Calculate the variance
- Calculate the SD
- Integrqate from -kSD<u<kSD
Q=4x+5Y+6Z, give var(Q), also give COV(Q,C), C=6X+2Y+Z
How to calculate the conditional density of x given y=y
- f(x|y)=... (fill in given y)
- E(X|y)=int(xf(x|y))
- E(X^2|y)=inf(x^2(f(|y)))
- var = 3-2^2
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