Multiple regression output from MINITAB for the PAH data of Exercise 53 in the previous section included the following information:

Unusual Observations Obs x1 flth Fit SE Fit Residual St Resid 6 243500 604.7 582.9 40.7 21.8 1.25X 7 67793 27.7 139.3 12.3 111.6 2.62R R denotes an observation with a large standardized residual X denotes an observation whose X value gives it large influence.

What does this suggest about the appropriateness of using the previously given fitted equation as a basis for inferences?

The investigators actually eliminated observation #7 and re-regressed. Does this make sense?