Question: 137 Consider fitting the multiple regression model E(y) = b0 + b1 x1 + b2 x2 + b3 x3 + b4 x4 + b5 x5

137 Consider fitting the multiple regression model E(y) = b0 + b1 x1 + b2 x2 + b3 x3 + b4 x4 + b5 x5 A matrix of correlations for all pairs of independent variables is shown. Do you detect a multicollinearity problem?

Explain.

X1 X2 X3 X4 X5 x1 .17 .02 .45 x2 891 -.23

138 Identify the problem(s) in each of the residual plots shown on page 707 .

.19 .93 .02 .22 -.01 X3. .86 X4 X5

X1 X2 X3 X4 X5 x1 .17 .02 .45 x2 891 -.23 .19 .93 .02 .22 -.01 X3. .86 X4 X5

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