Recall that the medical researchers measured the length of time in practice (i.e., years of experience) and the amount of exposure to ethics in medical school (number of hours) for a sample of 118 physicians. Consider a straight-line regression model relating hours of exposure (y) to time in practice (x).
a. Fit the model to the data saved in the file and conduct a test (at α = .05) for a linear relationship between the two variables.
b. In Exercise 2.132 you identified a highly suspect outlier for hours of exposure. Remove this outlier from the data set and rerun the analysis, part a. What do you observe?
For Information: Refer to the Journal of Medical Ethics (Vol. 32, 2006) study of physicians' use of ethics consultation, Exercise 2.131.