Homework 4

Book Exercises:
2.60, 2.62, 2.68, 2.73, 2.77, 2.78, 2.81, 2.84, 2.118

For 2.60, you do not need to turn in separate plots for parts a and b. Simply circle the outlier on your fitted line plot. For the second regression line (with outlier removed), you can either draw the regression line by hand on the same plot or create a new fitted line plot with the outlier removed. Be sure to provide your explanation of whether or not the point is influential as requested in part b .

In 2.62, a single fitted line plot is enough to take care of parts a and b.

In 2.73, you can make both types of residual plots in Minitab: Stat > Regression > Regression... > Graphs... > Residuals versus order OR Residuals versus the variables.