Use the computer output below for the model given in Example I to answer

11. Which, if any, of the independent variables 1 x , 2 x , and 3 x contribute information for the prediction of y?

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b = 1.04 b = 1.29 SE(b) = .42 b = 2.72 b = .41 SE(b) = .65 SE(b) = .17