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Unformatted text preview: Write the fitted equation. c. Plot the residuals versus predicted values from the fitted linear regression. Does the linear model seem appropriate? d. Fit a quadratic model to relate WEAR to RPM. Write the fitted equation. e. Does the quadratic equation fit significantly better than the linear equation? f. Plot residuals from the quadratic equation. Do you detect outliers? g. Remove outliers from the data set and refit the quadratic model. Compare predicted values of the quadratic fitted with and without the outlier. Where do you see the most effect?...
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- Fall '08