# Question: For the regression equation given in Exercise 1 the P value

For the regression equation given in Exercise 1, the P-value is 0.000 and the adjusted R2 value is 0.925. If we were to include an additional predictor variable of neck size (in.), the P-value becomes 0.000 and the adjusted R2 becomes 0.933. Given that the adjusted R2 value of 0.933 is larger, is it better to use the regression equation with the three predictor variables of length, chest size, and neck size? Explain.

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