13.64-13.72

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13.64 what is the interpretation of the "y" intercept and the slope in the simple linear regression equation?

13.65 what is the interpretation of the coefficient of determination?

13.66 when is the unexplained variation (i.e., error sum of squares) equal to 0?

13.67 when is the explained variation (i.e., regression sum of squares) equal to 0?

13.68 why should you always carry out a residual analysis as part of a regression model?

13.69 what are the assumptions of regression analysis?

13.70 how do you evaluate the assumptions of regression anaylsis?

13.71 when and how do you use the durbin-watson statistics?

13.72 what is the difference between a confidence interval estimate of the mean response uyx=xi, and prediction interval of yx=xi?
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