search for: groupgroup3

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2009 Aug 28
1
how to explain the interaction terms regarding "treatment contrast" of lm model
...oup * sub) Residuals: Min 1Q Median 3Q Max -1.24378 -0.50184 -0.03726 0.51748 1.34034 Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 3.5062 0.3278 10.696 9.98e-13 *** groupgroup2 1.3253 0.4636 2.859 0.00703 ** groupgroup3 2.7268 0.4636 5.882 9.98e-07 *** subb 0.1965 0.4636 0.424 0.67411 subc 1.3280 0.4636 2.865 0.00693 ** subd 1.3133 0.4636 2.833 0.00751 ** groupgroup2:subb 0.2188 0.6556 0.334 0.74052 groupgroup3:subb 0.2187 0...
2009 Sep 26
1
Multiple comparisons for coxph survival analysis model
...th, censor) ~ group + cluster(block), data = seedlings) > summary(cph.1) Call: coxph(formula = Surv(death, censor) ~ group+ cluster(block), data = seedlings) n= 27000 coef exp(coef) se(coef) robust se z p groupGroup2 0.436 1.55 0.0539 0.296 1.47 0.14 groupGroup3 3.048 21.06 0.0439 0.283 10.77 0.00 exp(coef) exp(-coef) lower .95 upper .95 groupGroup2 1.55 0.6467 0.865 2.76 groupGroup3 21.06 0.0475 12.100 36.67 Rsquare= 0.38 (max possible= 0.997 ) Likelihood ratio test= 12892 on 2 df, p=0...