what is the difference between a mixed mean and variance model what is meant by a mixed effect model of a patient and their variability what is meant by a mixed effect model of the patient's heart rate how to model intra patient variability why do i need to model the variability of my patients how to model the variability between variables? how to model patient variable how to model the effect of groups on mean and variance how to model the influence of each group on rpm is variability associated with group why is the variance of the heart rate of every person different in a mixed-effects model? how to calculate glm variance in a model when a glm variable has an intra-group variation what is the effect for each patient why do we use an antigen in the variable model why do you need multivariate mixed effects for a patient how to model the effect of a variable on the mean and variance of a patient? how to model for patients for variability what is the difference between glm and mixed effect why not do glm analyses which variable are the variables affected by a mixed effects model