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Unformatted text preview: A U B: the union of events A and B (A or B) A ∩ B: the intersection of events A and B (A and B) Abar ∩ Bbar: Event A does not occur and Event B does not occur 3.14 a. 151 300 = .503 b. c. d. e. 3.15 a. (100.5 + 83.3) / 571.7 = .3215 b. 1 – (100.5 + 83.3 + 85.3 + 78.1 + 80.5)/571.7 = 1.7481 = .2519 c. 27.8% (information is given in Example 3.5 on page 91) d. (14.6 + 38.8 + 37.9)/571.7 = .1597 3.16 See page 101 in text; explanations will vary. 3.17 Events are independent if the outcome of one does not affect the outcome of the other. 3.26 a. .820 – .793 = .027 difference b. =) 24 21 age 5 or 4 ( P 832 . 101 36 48 = + =) 34 25 age 5 or 4 ( P 829 . 123 36 66 = + =) 49 5 3 age 5 or 4 ( P 737 . 76 19 37 = + Most appealing: age 21–24 Least appealing: age 35–49 3.33 To update probabilities based on new information....
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 Spring '12
 online
 Probability, Probability theory, Probability space, experimental outcomes

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