ECO 3401 Chapter Notes - Chapter 4.3: University Of Houston, Product Rule, Conditional Probability
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40: find the probability that a stockbroker picked a stock that went up given that they did(cid:374)"t use research, number of stock going up and not using research = 30, number of not using research = 55/100. Part a: conditional probability: p (e l f) = (cid:4666)(cid:3006) n (cid:3007)(cid:4667) (cid:4666)(cid:3007)(cid:4667) or p (e l f) = (cid:4666)(cid:3006) (cid:3007)(cid:4667) (cid:4666)(cid:3007)(cid:4667) event occurs. Part b: conditional probability example: conditional probability the probability of one event given that another, remember: union = p (e) + p(f) p (e n f) What is the probability that a customer selected at random is female and has a store credit card: p(f) = 0. 6, p (c l f) = 0. 75, p (c n f) = 0. 6 * 0. 75 = 0. 45. Part e: independent events: product rule for independent events: p (e n f) = p (e) * p (f, ex. The probability that you do your math homework is 0. 8.
