193 
ered alternative answers to a question, and comparing the 
difference in proportions of the two groups found in the crit- 
1C¢ Ll sections D] means OI 1ormuia 10 
2 2%: hart ©) anda Moore i 15). S ee I 1gurcs 2 4 and 25 
Critical scores may also be set with regard to a combina- 
. > yy TY . 
5 ® 
® 
Wo 
og ® 
® ® eo 
) a 
i ® 
& ee 
% 0 0) @) 
oO ] ( n ) | OO 
j | a NT) y= Wy —r——1 Fes 
21 041 2 3 45% 78. 979°1112% 
Figure 25: Personal history scores of salesmen at different levels of success, 
Kenagy and Yoakum (89, p. 201).