Hi, If any one has time I need some help understanding the P-values given in the lmer output.
Using AIC for model selection I find my minimal model is FOLLOW~MOVERSTATUS+DISTANCE however it appears DISTANCE is not significant at 95% confidence, see output quoted below. However, removing DISTANCE gives a higher AIC=433.5, therefore I will keep it in, but am confused as to what is adds to the model. Are the p values given in output to be taken lightly? Thanks Krys >model<-lmer(FOLLOW~MOVERSTATUS+DISTANCE+(1|DATE), REML=FALSE, >family=binomial,data=m1) >model #Generalized linear mixed model fit by the Laplace approximation #Formula: FOLLOW ~ MOVERSTATUS + DISTANCE + (1 | DATE) # Data: m1 # AIC BIC logLik deviance #430.8 448.4 -211.4 422.8 # Random effects: # Groups Name Variance Std.Dev. # DATE (Intercept) 0.5957 0.77182 # Number of obs: 611, groups: DATE, 122 #Fixed effects: # Estimate Std. Error z value Pr(>|z|) #(Intercept) 2.06881 0.31086 6.655 2.83e-11 *** #MOVERSTATUSSUB -0.82564 0.28118 -2.936 0.00332 ** #DISTANCE 0.02311 0.01298 1.780 0.07503 . -------------------------------------------- Krystyna Golabek Room C79 School of Biological Sciences University of Bristol Woodland Road Bristol BS8 1UG U.K. Email: bz...@bristol.ac.uk Office: 0117 9545945 Web: http://www.bio.bris.ac.uk/people/staff.cfm?key=1183 Pied Babbler Research Project PO BOX 64 Van Zylsrus Northern Cape South Africa Web: http://www.fitzpatrick.uct.ac.za/docs/piedbabb.html Tel: +27 (0)53 781 0390 Email: mkp...@mweb.co.za (Please put my name in the subject box when using the above 'mkproj' email address) -------------------------------------------- _________________________________________________________________ Chat to your friends for free on selected mobiles [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
