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chapter2solutions

# chapter2solutions - STAT 230 Solutions to Problems Chapter...

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STAT 230 Solutions to Problems: Chapter 2 Note: Questions who solutions are not here are answered sufficiently well in the text. 2.4 a) Represent the letters by small letters, the envelopes by capitals. Note that pairs that are repeated from the previous line are not rewritten. Sample space: wW xX yY zZ yW xX wY zZ zY yZ zY wZ yX xY zZ wX xY zZ zY xZ zY xZ zX yY xZ zX xY wZ xY yZ wY xZ xW wX yY zZ zW xX yY wZ zY yZ wY yZ yX wY zZ yX xY wZ zY wZ wY xZ zX wY yZ wX yY xZ yY wZ xY yZ b) A: wW xX yY zZ zY yZ yX xY zZ zY xZ zX yY xZ xY yZ B: xW wX zY yZ yW wX zY xZ yX zY wZ zX xY wZ ` zX wY yZ wY xZ zW wX xY yZ yX xY wZ wY xZ C: wW xX zY yZ yW xX wY zZ zX yY xZ zW yY wZ yX xY zZ xW wX yY zZ D: No way, 3 correct Î all 4 are correct! c) Just count up the listing in b) and divide by 24! A: 6/24 = ¼ B: 9/24 = 3/8 C: 6/24 = ¼ D: 0

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2.5 a) Boxes 1 2 3 1 2 3 123 2 1 3 123 2 3 1 123 2 13 1 23 2 13 2 13 3 1 2 3 12 3 2 1 12 3 3 12 13 2 3 12 23 1 12 3 1 2 3 12 3 1 3 2 13 2 1 23 13 2 1 23 23 1 23 1
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