what is the difference between the red and the black in mixed effects what is non overlapping lines why do we draw lines what kind of lines should I draw when there are no overlapping lines are overlapping lines allowed what's the x axis what is non overlapping lines in mixed effects model why does an x axis comparison not work what is the x axis in a mixed effect model used for? what is the difference between overlapping lines in mixed effects what are mixed effects what is it called when two colour lines overlapping what is the difference between black and red axis are overlapping lines allowed in mixed effects does lmer model allow comparison across two colours why is the x-axis overlapping why are the colours overlapping why are the x axis and the x axis parallel how to draw inferences from non overlapping lines in mixed effects which direction do the a z and y axis lines parallel mean? i.e. which direction do the lines parallelize? i.e. which direction do the lines o