View source for Probability Review I

== Notions of Probability ==
Let us look at two notions of the ''probability'' of an event happening:

=== The Frequentist Version ===
Given <math>N</math> distinct possible events, <math>\left(x_1, x_2, \ldots, x_N\right)</math>, with the following assumptions:
* No two events can occur simultaneously, and 
* The events occur with frequencies <math>\left(n_1, n_2, \ldots, n_N\right)</math>,
Then the probability of an event <math>x_i</math> is given by:

{{NumBlk|::|<math>P\left(x_i\right)=\frac{n_i}{\sum_{j=1}^N n_j}</math>|{{EquationRef|1}}}}

=== Observer Relative Probability ===

== Probability Basics ==

== Conditional Probability ==