Too many U. S. Army mechanics are failing their yearly skills tests. Colonel Maxwell Brown believes that this failure rate results because mechanics do not learn anything from experience. His hypothesis is that time spent in an occupational specialty is unrelated to performance on the yearly skills exam. He regresses whether a mechanic failed the test (0 = failure, and 1 = no failure) on the mechanic’s time as a mechanic (X) in years. For a sample of 400 troops, he finds
 = .63 + .03X Sy|x = .41 sb = .61 r2 = .09
Evaluate Brown’s argument by interpreting the regression.