Review 2, ch 6-8, 2012 - AP Statistics Review 2 Chapters...

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AP Statistics Date _______________________________ Review 2, Chapters 6-8 6.40 Election Math: The students in a club are 40% seniors, 40% juniors, and 20% sophomores. A junior presidential candidate anticipates attracting 30% of the senior vote, 90% of the junior vote, and 50% of the sophomore vote. Draw a tree diagram with the probabilities for the grade level and the vote (for or against the candidate) of a randomly chosen voter. a) What percent of the overall vote does the candidate expect to get? b) Find the probability that a randomly chosen voter is a senior given he or she voted for the candidate. c) Find the probability that randomly chosen voter is a sophomore given he or she voted against the candidate. 8.33 Are we shipping on time? A mail-order company advertises that it ships 90% of its orders within three working days. Your statistical firm has been hired to assess the truthfulness of this claim. You randomly select 150 orders from this company and determine if the orders were shipped on time (within 3 working days) or not.
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