## Basic Probability Theory

Probability is the chance of something happening. For example, this chance could be getting a heads when we toss a coin. Here something is "getting a heads". Probability is expressed as a fractional value between "0" and "1". A "0" probability means something can never happen whereas a "1" probability indicates something always happens. Probability theory has a very close relationship with statistics and therefore with Six Sigma. Click to read more >>

## Probability and Statistics

Probability and statistics are closely related. A simple example illustrates this relationship. Click to read more >>