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Elementary Statistics ch.4 formulas Flashcards

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1879804426Formula of Classical ProbabilityP(E) = # of fav outcomes # of all outcomes0
1879813342Formula for empirical probabilityP(E) = frequency for class Total frequencies in distribution1
1879817557Two mutually exclusive eventsP(A or B) = P(A) + P(B)2
1879822570Not mutually exclusive eventsP(A or B) = P(A) + P(B) - P(A and B)3
1879827548Multiplication rule for independent eventsP(A and B) = P(A) • P(B)4
1879835534Multiplication rule for dependant eventsP(A and B) = P(A) • P(B|A)5
1879840966Conditional ProbabilityP(B|A) = P(A and B) P(A)6
1879847026Complementary eventsP(Ē) = 1 - P(E)7
1879850710Permutation (order is important)nPr = n! (n-r)!8
1879857197Combination (order is not important)nCr = n! (n-r)! r!9
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