A study was conducted at Virginia Tech to determine if certain static arm-strength measures have an influence on the “dynamic lift” characteristics of an individual. Twenty-five individuals were subjected to strength tests and then were asked to perform a weightlifting test in which weight was dynamically lifted overhead. The data are given here.

(a) Estimate β0 and β1 for the linear regression curve μY |x = β0 + β1x.

(b) Find a point estimate of μY |30.

(c) Plot the residuals versus the x’s (arm strength).
Comment.