Unformatted text preview: ) ‡ P(44.5 ≤ Y ≤ 55.5)
= P(1.1 ≤ Z ≤ 1.1)
= .86433  .13567 = .72866.
Therefore,
P(X<45 or X>55) ‡ 1  .72866 = 0.27134.
(b) This is a deep question, touching on the question of statistical significance: what
evidence is strong enough to overturn a reasonable assumption (the assumption that the coin
is fair)? Statisticians have developed various sophisticated ways of answering this question,
but we can look at one simple test now. Suppose that we tossed a coin 100 times and threw
66 heads. If the coin were fai...
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This note was uploaded on 01/28/2014 for the course STATISTICS 1010 taught by Professor Herbret during the Spring '13 term at Tulane.
 Spring '13
 Herbret
 Statistics

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