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Unformatted text preview: include zero. (c) log = log 164 178 130 11 = log 20 . 4 = 3 . 02 . SE log = r 1 y 1 + 1 n 1y 1 + 1 y 2 + 1 n 2y 2 = r 1 164 + 1 11 + 1 130 + 1 178 = 0 . 332 . The 95% condence interval for log is given by 3 . 02 1 . 96 . 332 = (2 . 37 , 3 . 67) . The 95% condence interval for is given by ( e 2 . 37 ,e 3 . 67 ) = (10 . 6 , 39 . 1) . The odds of dysplasia increase by 10 to 40 times for HPV + versus HPV. Also , the odds of HPV + increase 10 to 40 times for those with dysplasia versus those without. (d) We reject H : = 1 at the 5% level because the 95% condence interval does not include one. This agrees with part (b). (e) There is a signicant association between dysplasia and HPV; we reject no association at the 5% level in parts (b) and (d)....
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 Fall '09
 Hendrix

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