MATH 533 Week 6 Homework Problems.

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Mike Mentzer

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Mathematices

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MATH 533 Applied Managerial Statistics

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DeVry

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5

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WEEK 6 HOMEWORK Which of the following is not an assumption of the regression model? The error terms have constant variance The model is linear The error terms are normally distributed The error terms are independent The error terms decrease as x values increase Suppose for a given data set the regression equation is: y = 54.78 + 1.45x, and the point (0.00, 24.78) is in the data set. The residual for this point is. 24.78 −24.78 0.00 30.00 −30.00 If the standard error of the estimate for a regression model fitted to a large number of paired observations is 1.75, approximately 68% of the residuals would lie within. −3.50 and +3.50 −0.95 and +0.95 −0.97 and +0.97 −0.68 and +0.68 −1.75 and +1.75 For a regression model y = 30 − 2x, the coefficient of determination was determined as equal to 0.81. The coefficient of correla

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