Dear list members,

I have a question concerning multiple comparisons after using glm.

My response variable is days until emergence of an insect species. The explanatory variables are sex (two levels), parasitoids added (two levels) and populations (34 levels). I would like to know now  which populations are different in days until insect emergence.

For this I used multiple comparisons as followed:

model<-glm( daysuntilemergence ~ sex + parasitoidsadded +  population, quasipoisson )

glht(model, linfct = mcp(population = "Tukey"))
summary (glht(model, linfct = mcp(population = "Tukey")) )

I am not sure now if the obtained p-values  are for differences in days until emergence for the bean populations or if also the other factors : "sex "and "parasitoidsadded" are taken into account?

Thank you for answering!




Isabelle Zaugg, PhD Student
University of Fribourg
Department of Biology
Unit of Ecology & Evolution
Chemin du Musée 10
CH-1700 Fribourg
Switzerland
Phone: +41 (0)26 300 88 67
E-mail: isabelle.zaugg@unifr.ch<mailto:isabelle.zaugg@unifr.ch>


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