186 
J. 
EMPLOYMENT PSYCHOLOGY 
a BS 
Scores in Aptitude 2 = 
_ Test G (x) o 3 
8 gk RC ff) R&R fo 
4 lr a1) 
3 09 
° 2| 1.86] 
an 
k | 
& { 14 44| 
5 > 2 = | 32 -70 
Nx | | J 
Vx { 3 | 3.67 
Ge=3) - of + 771 
Fe—3)? | Ap es 
na(yx—7y)2 1 11.0, I of 3.54 {19.47 
N=30 
mean of 0 0 
yRmGerd=ng 
Ee JE 
Oy= \ N= 30 = 1.044 
Slna(y:—)?1 =19.47 
[S[n=(32—3)*] 
~ 
gm ys 
Figure 23: Illustrating the computation of the correlation ratio 77).