Read section 2.4.2 of Pinheiro and Bates again. It describes the
differences between the 4 methods of inference you tried (marginal
t-test, sequential F-tests, LRTs and CIs) and makes some
recommendations. There are some tricky issues involved in drawing
inferences from mixed models, and unfortun
I am running an lme model with the main effects of four fixed variables (3
continuous and one categorical see below) and one random variable. The
data describe the densities of a mite species awsm in relation to four
variables: adh31 (temperature related), apsm (another plant feeding mite)
aw
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