26and27_InClassActivities_SecondFourthBankAndFASBTastic

26and27_InClassActivities_SecondFourthBankAndFASBTastic -...

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ACC 333 (Farrell) Classes 26 & 27 Fall 2011 Page 1 of 3 In-Class Activity #1 – Customer Profitability at Second Fourth Bank Part 1: Joint, marginal, and conditional probabilities Suppose that Second Fourth Bank has the following sample data about the number of men and the number of women who use only on-line banking and who use only branch banking. Number of On-Line Bankers Number of Branch Bankers Total Men 288 672 960 Women 36 204 240 Total 324 876 1,200 a) Using the joint probability table below, compute the probability that a given customer chosen from the 1,200 in the sample will be: both a man and an on-line banker both a man and a branch banker both a woman and an on-line banker both a woman and a branch banker a n o n - l i n e b a n k e r a m a n a b r a n c h b a n k e r a w o m a n On-Line Banker Branch Banker Total Man Woman Total 1.0 b) Compute the following conditional probabilities. i) The probability that the customer is an on-line banker, given that the customer is a man. ii) The probability that the customer is an on-line banker, given that the customer is a woman. iii) Taken together, what do these two conditional probabilities suggest?
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ACC 333 (Farrell) Classes 26 & 27 Fall 2011 Page 2 of 3 Part 2: Bayes’ Theorem Suppose that Second Fourth Bank is reviewing its credit card policy with a view toward recalling some of its credit
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26and27_InClassActivities_SecondFourthBankAndFASBTastic -...

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