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【 苗C~,饵" .7. Il ,~ - 世界大学城

【 苗C~,饵" .7. Il ,~ - 世界大学城

【 苗C~,饵" .7. Il ,~ - 世界大学城

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O. 458 • Csex = 1) 00.4)表 10. 11 Li kelihood Ratio TestsEffectInterceptageeducdegreesex-2 Log Li kelihood of Reduced Model Chi-Square2600 , 138 a ,0002641 , 003 40 , 8652600 才 4 才0032627.453 27 , 3142637.480 37 ,341df内URL内/-白USig.000.999.001《 4.000The chi-square statistic is the difference in -2 log-likelihoods between the final model and areduced model , The reduced model is formed by omitting an effect from the final model. Thenull hypothesis is that all parameters of that effect are 0a This reduced m 口 del is equivalent to the final model because omitting the effect does not increase the degrees offreedom式 00.4) 中 Cagecat = 1) 指 当 年 龄 分 组 变 量 取 值 为 1 时 , 括 号 内 取 值 为 1, 反 之 为 0 。 实 际 上就 是 对 变 量 agecat 产 生 的 三 个 哑 变 量 之 一 , 其 他 依 此 类 推 。 大 家 还 可 以 写 出 独 立 候 选 人 与 克 林顿 比 较 的 回 归 模 型 。表 10.12Parameter EstimatesVOTE FOR CLl NTON,StdBUSH, PEROT a B Error Wald df Sig. Exp(B)Bush Intercep! -,836 778 1, 156 282age 001 003 096 757 1.001educ -,001 ,039 ,001 .978 ,999[degree=O] -, 224 426 277 599 799[degree=1] 384 283 1.845 174 1.468[degree=2] .435 ,298 2 , 133 .144 1.545[degree=3] .428 ,213 4 ,057 .044 1.534[degree=4] Ob 。[sex=1] 458 105 19 ,040 000 1.580[sex=2] Ob 。Perot Intercep! -,759 1 才 05 472 492age -,030 005 33 ,000 000 971educ -.003 055 003 959 997[degree=O] -.259 .641 I 才 64 .685 ,771[degree=1] 770 411 3.512 061 2.160[degree=2] 853 411 4 ,301 038 2.347[degree=3] ,618 ,316 3 ,819 .051 1.856[degree=4] Ob 。[sex=1] 772 142 29 .469 000 2.165[sex=2] Ob 。a The reference category is: Clintonb. This parameter is set to zero because it is redundant• 198 •

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