Consider the bearing wear data in Exercise 12-19. (a) Find 99% confidence intervals on 1 and 2.
Question:
Consider the bearing wear data in Exercise 12-19.
(a) Find 99% confidence intervals on 1 and 2.
(b) Recompute the confidence intervals in part
(a) after the interaction term x1x2 is added to the model. Compare the lengths of these confidence intervals with those computed in part (a). Do the lengths of these intervals provide any information about the contribution of the interaction term in the model?
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Related Book For 
Applied Statistics And Probability For Engineers
ISBN: 9780470053041
5th Edition
Authors: Douglas C. Montgomery, George C. Runger
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