what is the variable variable used in the mixing method what is the r fixed effects what is the model of an individual? what is the parameter for the r model can you estimate the effects of the mixture model how to estimate a fixed effect what is meant by variable in mixed model? what is the model of a fixed effect how to estimate the fixed effects of a mixed model what is the average model of mixed effects which model assumes all individuals follow a single underlying time series? what is the parameter for a fixed effect model how to estimate a fixed effects model what is the variable for the time series what kind of model to use for determining the group or individual? which of the following is the parameter for the time effect of the mixed model? why use a mixture model which of the following is the function for the fixed-effects model? what is the fixed effects of the mixture model? what is the value of the variable pi_ij in the r model