MulticategoryExample1_2011

MulticategoryExample1_2011 - Statistics 665 Spring 2011...

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1 Statistics 665, Spring 2011, Kaizar Contraceptive Example Binomial Model Including Year, grouped by Year: Call: vglm(formula = namcsgrp ~ yearcode, family = multinomial) Pearson Residuals: Min 1Q Median 3Q Max log(mu[,1]/mu[,3]) -3.7297 -0.019419 0.55177 0.904538 1.7490 log(mu[,2]/mu[,3]) -1.0767 -0.429307 -0.13550 -0.041838 1.0391 Coefficients: Value Std. Error t value (Intercept):1 -1.270538 0.136945 -9.2777 (Intercept):2 -11.502159 1.829591 -6.2867 yearcode:1 -0.081258 0.022178 -3.6640 yearcode:2 0.885344 0.177863 4.9777 Number of linear predictors: 2 Names of linear predictors: log(mu[,1]/mu[,3]), log(mu[,2]/mu[,3]) Dispersion Parameter for multinomial family: 1 Residual Deviance: 40.59137 on 20 degrees of freedom Log-likelihood: -664.0135 on 20 degrees of freedom Number of Iterations: 6 1 1 1 1 1 1 1 1 1 1 1 1 1994 1996 1998 2000 2002 2004 0.0 0.2 0.4 0.6 0.8 Contraceptive Prescriptions year Proportion 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 1 2 3 Desogestrel Drospirenone Non-Desogestrel
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2 1 1 1 1 1 1 1 1 1 1 1 1 1994 1996 1998 2000 2002 2004 -5 -4 -3 -2 -1 Contraceptive Prescriptions year Baseline Log Odds 2 2 2 2 2 2 2 2 2 2 2 2
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3 Changepoint model, with group=year: Call: vglm(formula = namcsgrp ~ yearcode + z + z * yearcode, family = multinomial) Pearson Residuals: Min 1Q Median 3Q Max log(mu[,1]/mu[,3]) -3.17863 -7.2542e-01 -2.1836e-01 1.2272e+00 2.05755 log(mu[,2]/mu[,3]) -0.18124 -1.1827e-05 -2.0140e-06 1.1063e-05 0.31295
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