search for: ffactor1

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2007 Dec 20
0
test for factor effect with nested glm
...A Df Sum Sq Mean Sq F value Pr(>F) factor1 15 85.99 5.73 3.1332 8.702e-05 *** factor1:factor2 42 131.75 3.14 1.7145 0.005654 ** Residuals 308 563.52 1.83 / and recalculate the Fvalue for factor1 as follows: /> ffactor1<-(85.99/15)/(131.75/42) > fpop [1] 1.827491 > 1-pf(ffactor1,15,42) [1] 0.06285258/ My question is: am I allowed to do the same with an Analysis of Deviance table, calculated on a glm model, as done hereafter: /> mod2<-glm(M~factor1/factor2, family=Gamma(link=identity)) > amo...