Probability Models and Rules

These flashcards cover key terms and concepts related to probability models, including definitions and notations used in probability theory.

Probability Model

Shows all possible outcomes AND their probabilities.

Complement

The probability of an event happening and not happening.

Sample Space

A list showing all possible outcomes, useful when all outcomes are equally likely.

Mutually Exclusive

When two events cannot happen at the same time.

Union (U)

Notation for the probability of A or B happening.

Intersection (∩)

Notation for the probability of A and B happening.

Experimental Probability

Probability based on the actual results of an experiment.

Formal Addition Rule

P(A U B) = P(A) + P(B) if A and B are mutually exclusive.

P(X=4+)

The probability of a randomly selected mother having four or more children.

P(X < 2)

The probability that a randomly selected mother has less than 2 children.