A Brief Introduction to Statistics - Part 2 - Probability and Distributions
Probability concepts form the foundation for statistics. A formal definition of probability: The probability of an outcome is the proportion of times the outcome would occur if we observed the random process an infinite number of times. This is a corollary of the law of large numbers: As more observations are collected, the proportion of occurrences with a particular outcome converges to the probability of that outcome. Disjoint (mutually exclusive) events as events that cannot both happen at the same time.