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Probability
Term | Definition |
---|---|
Fundamental Principle of Counting | If one task can be accomplished in m ways and a second task can be accomplished in n ways, then the first task followed by the second task can be accomplished in mxn ways |
Permutation | A way in which a number of things can be arranged |
Combination | A selection of objects chosen from a given set |
Event | A result we want from a number of outcomes |
Sample Space | A set of all possible outcomes |
Mutually Exclusive Events | Events that cannot occur together |
Addition Law | P(A or B)= P(A) + P(B) |
Exhaustive Events | A set of events containing all possible outcomes |
Independent Events | Events where the outcome of the first event doesn't affect the outcome of the second event |
Multiplication Law(AND rule) | P(A and B)= P(A) x P(B) |
Conditional Probability | The probability of an event being dependant on the previous event |
P(A|B)= | P(A and B)/P(B) |
General Multiplication Law | P(A and B)= P(A) x P(B|A) or P(B) x P(A|B) |
Relative Frequency | Number of successful trials/total number of trials (in decimal form) |
Expected Frequecy | Probability x Number of Trials |