1.ch12, ch15 共筆已經發了，請找我或家寧領取 電腦課的共筆都已經在ftp上了，請取用 2.娜姐：「只會考14和15章的公式」 但是大家還是多少看一下前幾章的公式吧 3.ch15的作業已經發回，包括以前所有作業，請大家領回， 考完生統我會立刻把他們回收~~ 男生請來304寢，女生請洽郭家寧 ---------------------------------------------------- ch15答案 1. 略 4. 略 6. (a) 0.01 (b) 0.025 (c) 4.61 8. (a) Table of expected counts drove while Year -------------------- total driving 1983 1987 ------------------------------------------------- YES 1116.3 1124.7 2241 NO 1520.7 1532.3 3053 ------------------------------------------------- total 2637 2657 5294 x^2=54.94 df=1 p<0.001<α=0.05 所以reject 虛無假說 (α=0.05) (b) There does appear to be an association between driving while drinking and calendar year. (c) p hat one=0.474 p hat two=0.373 p hat=0.423 z=7.43 p<0.001<α=0.05 所以reject 虛無假說 (α=0.05) (d) (0.0745, 0.1274) (z=1.96) (e) The 95% confidence interval does not contain the value 0. Since we reject the null hypothesis that the population proportions are identical, we would not have expected that it would. 12.(a) use McNemar's test x^2=8.10 df=1 0.001<p<0.010<α=0.05 所以reject 虛無假說 (α=0.05) (b) In the case, the data are presented as if they were independent rather than paired samples. There are 6650 observations and only 3325 slides. The data would be analyzed(incorrectly) using Chi-square test. 17.(a) 2*2 Contingency Table 子宮外孕 骨盆發炎 ------------------ total yes no ------------------------------------------------ yes 28 6 34 no 251 273 524 ------------------------------------------------ total 279 279 558 (b) 勝算比OR=5.08 (c) ln(OR)=1.625 se│ln(OR)│=0.210 99% confidence interval for the logaritum of the odd ratio: 1.625±2,58(0.210) 99% confidence interval for the odd ratio itself: (2.95, 8.73) 乙班生統組頭 --

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