Question Answer
Sample Space List of all possible outcomes
Event Any collection of outcomes from some chance process (A, B, C,…)
Probability model Description of some chance process that consists of 2 parts= sample space and a probability for each outcome(Table)
Discrete Countable # of outcomes
Continuous # Uncountable # of outcomes
Sample w/replacement Put back what we you took out (independent)
Mutually Exclusive Have no outcomes in common AND can never occur at the same time if P(A and B) = 0
Disjoint events equation (or mutually exclusive rule) P(A or B)= P(A) + P(B)
Probability an event WON'T occur P(A^c)= 1-P(A)(One minus the probability that it will occur)
P (A or B) A U B
P (A and B) A (upside down U) B
P( A or B) equation: P(A) + P(B) – P(A and B)
Conditional Probability Given the denominator, not the whole
P (A | B) = P(A and B) / P(A)
General multiplication rule Used to check if probabilities are mutually exclusive
General multiplication rule Equation P(A and B) = P(A) a?? P(B | A)
AND Multiply
OR Add
Independent One event doesn't change the probability that the other will happen
Multiplication Rule for Independent Events P( A and B) = P(A) a?? P(B)
Stats Probability

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