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 Cooks distance for the observations in this data set. Are there any influential points in these data?
Transcribed Image Text:
Brightness (%): Contrast (%): Useful range (ng): 96 50 50 112 54 61 65 100 100 100 50 57 54 50 65 80 96 80 155 25 35 26 56 80 70 144 255
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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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