what is the model of a typical case study for an experimental approach is size_y correlated to the value of the residual why the relationship between size_y and size_x is linear? what are the values for size x and size y definition of assumption violations in modeling what is an assumption violation in an ols regression why are two variables correlated? what is the difference between size_x and size_y? how to model assumptions against residuals what is the function of size_y what is the difference between size_y and size_x which residual is a function of two measures of a measurement? which assumption is violated in data analysis how to model a heteroscedastic data set difference between model size and performance what makes an assumption violation f? which variable is independent and is correlated? what is an assumption violation? what is the difference in size_y and size_x what is the characteristic of an assumption violation of residual