Suppose we estimate the regression Yt = β1 + β2X2t + β3X3t + ut using 40 months of data. Using the residuals from this regression, we run another regression of on the X2, X3, their squares and cross-products . From this regression we get a coefficient of determination R2 of 0.31. Let H0 be that there is no heteroscedasticity. What can you conclude?
We cannot conclude that there is heteroscedasticity at a level of significance of 5%.
Unable to reject the null hypothesis of no heteroscedasticity at a level of significance of 1%.
Reject the null hypothesis of no heteroscedasticity at a level of significance of 1%.
We conclude that there is heteroscedasticity at a level of significance of 5%.
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