MATH 218 Study Guide - Midterm Guide: Null Hypothesis, Random Variable, Decimal Mark
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Professors: j. colwell, f. lin, k. styrkas, e. verona, z. vorel. A random sample of 50 purchases at a department store produced the follow- ing contingency table for the method of payment and the size of the purchase: In game a, the player has a 4% chance of winning. In game b, the player has a 3% chance, and in game c, a 2% chance. You know that your friend, who likes the carnival, is equally likely to play any of the three games. (a) draw a tree diagram to depict this situation. Include all events and probabilities (conditional and joint) involved. (b) you go to the carnival and see your friend with a stu ed dragon which she won at one of the games. What is the probability that she won it at game a? (c) inspired by your friend"s success, you decide to play one game. Game a has ceased to operate for the day.
