Find the best predicted value of y corresponding to the given value of x. The regression equation relating attitude rating (x) and job performance rating (y) for the employees of a company is hat(y)=11.7+1.02x. Ten pairs of data were used to obtain the equation. The same data yield r=0.563. Use significance level 0.05.

a) what is the best predicted job performance rating for a person whose attitude rating is 79?

b) why? explain it.