linear model estimation in the presence of heteroscedasticity is a linear model based on heteroscedasticity? ols linear model definition which term in the linear model is used to predict the error terms of a random variable? what is used in an estimation model which of the following is a typical example of an approximate linear model developed? when is the linear model developed? is the linear model a heteroscedastic model which variable is not an error in the linear model what is the linear model what is linear model estimation in the presence of heteroscedasticity linear model estimation in the presence of heteroscedasticity how is a linear model developed how to determine heteroscedasticity in linear model how to use linear model estimation method what is the underlying condition for a model? why or why not which statement describes a linear model what is a linear model which variable is a linear model when to use linear estimator