Question

Write down a model that allows the variance of
u differ between men and women.
The variance should not depend on other factors. (Hint: Specify Var(u|x1;:::;xk) = ((σ^2)*h(x1;:::;xk)) where the heteroskedasticity function h (x1;:::;xk) is a function of male.)

Original function is
sleep=β0+β1totwrk+β2educ+β3age+β4age^2+β5yngkid+β6male+u


HELP PLEASE D;