what is the error for a random effect what error occurs when you use lmer package what is lme4 random effects must be lmer error when using lmer package, the number of continuous variables for the random effects must be less than random effect must be less than the number of observations lmer os error for grouping factors random effects must be less than the number of observations why lmer package error what is the error lmer what does random effect mean lmer package errors lmer model error numbers what is the problem when random effects of a categorical variable are less lmer model number of random effects must be less than the number of observations which parameter is used to find the relationship between the continuous variable x1 and the categorical variable x2? random effects must be less than the number of observations lmer error what is the error in lmer package what is the parameter that requires the number of observations to be less than the random effect?