Consider the regression model fit to the gray range modulation data in Exercise 12-19. Use the useful
Question:
(a) Calculate 99% confidence intervals on each regression coefficient.
(b) Calculate a 99% confidence interval on mean useful range when brightness = 70 and contrast = 80.
(c) Calculate a prediction interval on useful range for the same values of the regressors used in part (b).
(d) Calculate a 99% confidence interval and a 99% a prediction interval on useful range when brightness = 50 and contrast = 25. Compare the widths of these intervals to those calculated in parts (b) and (c). Explain any differences in widths.
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Applied Statistics And Probability For Engineers
ISBN: 9781118539712
6th Edition
Authors: Douglas C. Montgomery, George C. Runger
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