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PSTAT 109: Quiz 2 Winter 2014




Question;PSTAT 109: Quiz 2Winter 2014Instructions: Please show all work in an organized fashion for full credit.Problem 1.FindC1[C2andC1\C2if(a)C1=f0,1,2g,C2=f2,3,4g,(b)C1=fx: 0< x <2g,C2=fx: 1x <3g.Problem 2.Suppose our sample space isf(x, y):x2+y21g. What is the complementof the set/eventA=f(x, y):x2+y2= 1g?Problem 3.To join a certain club, a person must be either an economist, or a statistician,or both. Of the total members in this club, 76% are economists, and 64% are statisticians.What percentage of persons in the club are both an economist and a statistician?Problem 4.After a hard-fought football game, it was reported that, of the 11 startingplayers, 8 hurt a hip, 6 hurt an arm, 5 hurt a knee, 3 hurt both a hip and an arm, 2 hurtboth a hip and a knee, 1 hurt both an arm and a knee, and no one hurt all three. Commenton the accuracy of the report.


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