what package can I use when analyzing a sample what are mixed effects and multistage sampling what are sampling weights used for in mixed effects? can nlme model mixed effects how to do mixed effects analysis in r what is the mixed effects model in r can lme model mixed effects what is survey package in r can a mixed effects model use the survey can r use multi-stage sampling can nlme use surveys why do you need mixed effects in research samples does survey weighted model include mixed effects what packages can be used to create a mixed effects model in r which r package can you use for hierarchical model how to do a mixed effect survey in r what kind of research requires mixed effects do you use sampling weights when creating nlme model can lm regression rely on a sample weighted sample what packages do mixed effects analysis