Stats chapter 5 vocab

Complementary events

Two events that are mutually exclusive and cover all possible outcomes of a trial, meaning one event occurs if and only if the other does not.

Mutially Exclusive

Events that cannot occur at the same time.

Intersection

When two events occur at the same time. This is denoted as A n B

Union

When both events occur. This is denoted as A u B

The union rule

P(A u B) = P(A) + P(B) - P(A n B)

Independent events

Events where the outcome of one event does not effect the outcome of another event

Independent event equation

P(A n B) = P(A) * P(B)

Conditional probability

The probability of a second event occurring, given that the first event has already happened.