3. Consider the bi-variate linear regression model: Y = Be + B,X, + B,X,+ u. Show how the model can be transformed in order to test the following null hypotheses involving single restrictions with a t-test versus an F-test. Also, after you have transformed the models, specify the null hypothesis that will be tested; that is, the null that is equivalent to the original null. H: 6.- B. A. B H:. + 26.0 3. Consider the bi-variate linear regression model: Y = Be + B,X, + B,X,+ u. Show how the model can be transformed in order to test the following null hypotheses involving single restrictions with a t-test versus an F-test. Also, after you have transformed the models, specify the null hypothesis that will be tested; that is, the null that is equivalent to the original null. H: 6.- B. A. B H:. + 26.0