Consider the regression model fit to the gray range modulation data in Exercise 12-19. Use the useful
Question:
(a) What proportion of total variability is explained by this model?
(b) Construct a normal probability plot of the residuals. What conclusion can you draw from this plot?
(c) Plot the residuals versus y and versus each regressor, and comment on model adequacy.
(d) Calculate Cook€™s distance for the observations in this data set. Are there any influential points in these data?
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a R 2 756 b Assumption of normality appears adequate c Assumption of constant ...View the full answer
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Related Book For 
Applied Statistics And Probability For Engineers
ISBN: 9781118539712
6th Edition
Authors: Douglas C. Montgomery, George C. Runger
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