| Line 12: | Line 12: | ||
<math>P(A|B) = \frac{P(A \cap B)}{P(B)}</math> | <math>P(A|B) = \frac{P(A \cap B)}{P(B)}</math> | ||
| − | + | Properties: | |
1) <math>P(A|B) \ge 0</math> | 1) <math>P(A|B) \ge 0</math> | ||
| Line 30: | Line 30: | ||
| − | '''The common random variables:''' bernoulli, binomial, geometric, and how they come about in problems. | + | '''The common random variables:''' bernoulli, binomial, geometric, and how they come about in problems. AlSo |
their PMFs. | their PMFs. | ||
Revision as of 12:11, 25 September 2008
You can get/put ideas for what should be on the cheat sheet here. DO NOT SIGN YOUR NAME
Sample Space, Axioms of probability (finite spaces, infinite spaces)
$ P(A) \geq 0 $ for all events A
Properties of Probability laws
Definition of conditional probability, and properties thereof
$ P(A|B) = \frac{P(A \cap B)}{P(B)} $
Properties:
1) $ P(A|B) \ge 0 $
2) $ P( \Omega |B) = 1 $
3) if A1 and A2 are disjoint $ P(A1 \cup A2|B) = P(A1|B) + P(A2|B) $
Bayes rule and total probability
$ P(A|B) = \frac{P(A \cap B)}{P(B)} $
Definitions of Independence and Conditional independence
Definition and basic concepts of random variables, PMFs
The common random variables: bernoulli, binomial, geometric, and how they come about in problems. AlSo
their PMFs.
Geometric RV
P(X=k) = (1-p)^(k-1) * p for k>=1
$ E[X] = 1/p $
Definition of expectation and variance and their properties
$ Var(X) = E[X^2] - (E[X])^2 $
Joint PMFs of more than one random variable
