4) The following model was used to relate E(y) to a single qualitative model with four levels: + E(y) = Bo + Bixi + B2x2

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4 The Following Model Was Used To Relate E Y To A Single Qualitative Model With Four Levels E Y Bo Bixi B2x2 1 (59.55 KiB) Viewed 66 times

4) The following model was used to relate E(y) to a single qualitative model with four levels: + E(y) = Bo + Bixi + B2x2 + B3x3 Where X = - if level 2 O if not X2= (1 if level 3 0 if not { (1 if level 4 X3 = O if not This model was fit to n= 30 data points and the following result was obtained: Y bar = 10.2 - 4X1 + 12 X2 + 2X3 i) ii) Use the least squares prediction equation to find the estimate of E(y) for each level of the qualitative independent variable. Specify the null and alternative hypotheses you would use to test whether E(y) is the same for all four levels of the independent variable.