how does random effects work in r what type of model does randomization have? what is the difference between a random selection and a dependent variable how to model an experimental data set in r which variable is used to randomize the effects of a stimulus? how do i model random effects in r cost vs cost in a factorial model how do you use multilevel models why do experiments use multilevel model lme package what is a r package for random effects what is the r multi-level model of random effects? how to model r data how to model the interaction between a factor and an experiment r how does r model a random effect what is randomization model used for random effects r how to model random variables in r what is the difference between the variable msg and the dependent variable msg what model would use both cost and msg to model