Are steps a, b, and c correct? What is step d, please?

The data show the number of hits and the number of at bats for 7 major league players in recent World Series.

At Bats I 59 66 77 46 50 39 Hits y 23 25 31 22 21 15\f2 X Y xy 59 23 1357 3481 529 66 25 1650 4356 625 77 31 2387 5929 961 46 22 1012 2116 484 50 21 1050 2500 441 39 15 585 1521 225 Xx = 337 >y =137 Exy = 8,041 Ex- =19903 Zyz =3,2656 ( 8041)- (337) (137) = 0.9478 = 0.948 [6 ( 19,903) -(337)-] [6( 3,265)-(137)=]