what is the s shaped qq plot what is a qq plot what is pos.centered qq plot in linear models what model can you use to find the qq plot in a plot how to deal with very s shaped qq plot in a linear mixed model what is pos.centered qq what is the value for qq plot what is the difference between the qq plot and the center position in the linear model? how do i find an interaction on a qq plot why is t a fixed effect? why would qq be very sshaped how does qq plot work in a mixed model what model would you use to measure a very s-shaped qq? cond.lag 1:pos.centered what is the function that is used to check if the qq plot is s-shaped? qq model definition how to solve an qq plot in a data set how to find the correlation coefficient for qq plot in a mixed model how to find a qq plot t