Reconsider the experiment in Problem 5.24. Use the Box-Cox procedure to determine whether a transformation on the response is appropriate (or useful) in the analysis of the data from this experiment.
Problem 5.24
An article in the Journal of Testing and Evaluation (Vol. 16, no. 2, pp. 508-515) investigated the effects of cyclic loading and environmental conditions on fatigue crack growth at a constant 22 MPa stress for a particular material. The data from this experiment are shown below (the response is crack growth rate):
(a) Analyze the data from this experiment (use α = 0.05).
(b) Analyze the residuals.
(c) Repeat the analyses from parts (a) and (b) using ln (y) as the response. Comment on the results.