Question: Suppose that in Problem 13.31, t stat for testing the contribution of X 2 is 3.27. At the 0.05 level of significance, is there evidence

Suppose that in Problem 13.31, t_statfor testing the contribution of X₂ is 3.27. At the 0.05 level of significance, is there evidence that X, makes a significant contribution to the model?

Data From Problem 13.31:

Suppose X₁ is a numerical variable and X₂ is a dummy variable with two categories and the regression equation for a sample of n = 20 is

= 6 + 4X; + 2X2i

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