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11_Probability_Sp08_BB_nocolor

11_Probability_Sp08_BB_nocolor - Probability Probability...

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1 Probability Probability Readings Pages 135-140 in your book Online text book: http://davidmlane.com/hyperstat/probability.html Probability The likelihood of an event occurring expressed as the ratio of the number of actual occurrences to the number of possible occurrences. Probability • Event = basic data point/outcome on a single trial – e.g., rolling a 4 on a die The study of probability mostly concerns itself with frequency related probability

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2 Probability The probability of picking a red marble is 5 out of 7, or 5/7. The probability of picking a blue marble is 2 out of 7 The probability of picking a red marble or a blue marble is 7 out of 7 5 Red Marbles 2 Blue Marbles Probability Events we’ll consider are: – Independent: when the occurrence or nonoccurrence of one event has no effect on the occurrence or nonoccurrence of the other event. – Mutually exclusive: if the occurrence of one event precludes the occurrence of the other event.
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11_Probability_Sp08_BB_nocolor - Probability Probability...

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