Question: Suppose X1 is a numerical variable and X2 is a dummy variable and the following is the regression equation for a sample of n =

Suppose X1 is a numerical variable and X2 is a dummy variable and the following is the regression equation for a sample of n = 35 is:

a. Interpret the meaning of the slope for variable X1.

b. Interpret the meaning of the slope for variable X2.

c. Suppose that the t statistic for testing the contribution of variable X2 is 2.67. At the 0.05 level of significance, is there evidence that variable X2 makes a significant contribution to the model?

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