458 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



Table 127. — Comparison of alpha tests — Continued. 



[Vol. XV, 



Tests. 



Noncommissioned officers, Infantry v. "Standard" 



"Best" Infantry 0. "poorest" Infantry 



"Best" Infantry v. "Standard" 



"Best" Infantry v. Noncommissioned officers, Infantry 



"Best" Field Artillery v. "poorest" Field Artillery 



"Best" Field Artillery v. "Standard" 



"Best" Field Artillery v. "best" Infantry 



Noncommissioned officers, Field Artillery d. "best" Field 

 Artillery. 



Noncommissioned officers, Field Artillery v. "poorest" 

 Field Artillery. 



Noncommissioned officers, Field Artillery v." Standard ".. . 



Noncommissioned officers, Field Artillery v. noncommis- 

 sioned officers, Infantry. 



"Superior" r. "inferior" (Kearny) 



" Superior ' ' ( Kearny, Infantry) v." Standard " 



"Standard" v. "inferior" (Keamy, Infantry) 



0.87 

 6.8 



(2) 

 3.16 

 8.4 



(1) 

 1.12 

 4.4 



(4) 

 .25 

 1.0 



(7) 

 2.24 

 7.8 



(2) 

 1.65 

 8.4 



(2) 

 .52 

 1.8 



(1) 

 .39 

 1.4 



(6.5) 

 2.63 



10.1 



(1.5) 

 2.03 



11.5 



(2) 

 1.16 

 6.2 



(2) 

 2.88 

 5.9 



(5) 

 2.38 

 8.8 



(3) 

 .50 

 1.2 



(5.5) 



1.09 

 5.7 



(3) 

 3.87 

 7.6 



(4) 

 1.29 

 3.9 



(8) 

 .21 

 .6 



(8) 

 2.46 

 7.2 



(8) 

 1 84 

 7.6 



(3) 

 5.6 

 1.5 



(2) 

 .91 

 2.7 



(1) 

 3.37 



10.1 



(1.5) 

 2.75 



11.8 



(1) 

 1.67 

 9.0 



(1) 

 2.94 

 5.5 



(7) 

 2.82 

 8.9 



(2) 

 .11 

 .3 



(7.5) 



1.33 

 6.9 



(1) 

 4.26 

 8.3 



(2) 

 1.84 

 5.6 



(1) 



.51 

 1.5 



(6) 

 2.73 

 7.6 



(4) 

 2.15 

 8.6 



(1) 

 .31 

 .8 



(3) 

 .16 

 .4 



(8) 

 2.89 

 8.2 



(8) 

 2.31 

 9.6 



(4) 



.97 

 3.9 



(7) 

 2.93 

 6.94 



(4) 

 1.91 

 6.7 



(5) 

 1.02 

 2.7 



(3) 



2.10 

 4.6 



(7) 

 7.19 

 5.6 



(7) 

 3.67 

 4.2 



(5) 

 1.57 

 1.8 



(4.5) 

 5.59 

 6.8 



(7) 

 3.85 

 5.9 



(5) 

 .18 

 .2 

 8 



1.84 

 2 2 



(5:5) 



7.43 

 9.1 



(6) 

 5.69 

 9.1 



(5) 

 3.59 

 5.4 



(4) 

 9.47 

 7.6 



(1) 

 6.58 

 6.8 



(4) 

 2.89 

 3.3 



(2) 



0.99 

 3.1 



(8) 

 3.92 

 4.7 



(8) 

 2.03 

 4.1 



(6) 

 1.04 

 2.0 



(2) 

 3.91 

 6.6 



(8) 

 2.22 

 4.9 



(8) 

 .19 

 .3 



(6.5) 



.83 



1.4 



(6.5) 

 4.74 

 8.4 



(7) 

 3.05 

 7.4 



(8) 

 2.06 

 4.7 



(5) 

 4.81 

 4.5 



(8) 

 3.72 

 5.7 



(6) 

 1.08 

 1.2 



(5.5) 



1.13 

 5.4 



(4.5) 

 3.69 

 7.2 



(5) 

 1.74 

 5.2 



(2) 

 .61 

 1.8 



(4.5) 

 2.94 

 7.7 



(3) 

 1.97 

 7.1 



(4) 

 .23 

 .6 



(4.5) 

 .73 

 1.9 



(4) 

 3.67 

 9.7 



(4.5) 

 2.71 



10.0 



(3) 

 1.57 

 5.6 



(3) 

 3.87 

 5.8 



(6) 

 2.58 

 5.4 



(7) 

 1.29 

 2.6 



(4) 



2.19 

 5.1 



(6) 

 7.20 

 7.1 



(6) 

 3.91 

 4.6 



(3) 

 1.75 

 2.0 



(2) 

 5.98 

 7.5 



(5) 

 3.30 

 5.1 



(7) 



-.61 

 .6 



(4.5) 

 1.72 

 2 ° 



(.2. 5) 

 7.71 

 9.7 



(4.5) 

 5.03 

 7.9 



(7) 

 2.86 

 4.2 



(6) 



10.20 

 7.1 



(2.5) 

 9.85 

 9.2 



(1) 

 3.49 

 .3 



(7.5) 



2.57 

 5.4 



(4.5) 

 8.94 

 7.8 



(3) 

 3.31 

 4.0 



(7) 

 1.73 

 2.0 



(2) 

 6.96 

 8.1 



(1) 

 3.57 

 6.4 



(6) 

 .26 

 .3 



(6.5) 

 1.46 

 1.7 



(5) 

 8.42 



10.0 



(3) 

 5.03 

 8.1 



(6) 

 2.45 

 3.8 



(8) 

 8.62 

 7.1 



(2.5) 

 4.25 

 4.8 



(8) 

 4.36 

 4.6 



(1) 



Table 128. — Comparison of alpha tests. 



[Degree in which pairs of groups (at left of table) are differentiated by performance in every test (ef. preceding table). Degree of differentiation 

 is measured by the x 2 test (see text) and figures in table are values of x 2 . The figures in parentheses give the rank order of every test with 

 respect to its effectiveness in differentiation as measured by the x 2 test. Data are from Camps Custer, Kearny and Travis.] 



"Superior" v. "inferior" (Kearny) 



"Superior" 8. "average" (Kearny) 



"Standard" v. "10 poorest" (Infantry, Travis) 



"Standard" v. "10 poorest" (Field Artillery, Travis) 



"10 poorest," Field Artillery, v. "10 poorest," Infantry 



Noncommissioned officers, Infantry v. "poorest" 



Noncommissioned officers, Infantry v." standard " 



"Best," Infantry!), "poorest," Infantry 



" Best," Infantry v. ' 'standard " 



"Best," Infantry, v. Noncommissioned officers, Infantry 



"Best," Field Artillery, v. "poorest," Field Artillery 



"Best," Field Artillery, V. "standard" 



" Best," Field Artillery v. " best" Infantry 



Noncommissioned officers, Field Artillery, v. "best," Field 

 Artillery 



Noncommissioned officers, Field Artillery v. "poorest," Field 

 Artillery 



Noncommissioned officers, Field Artillery v. "standard" 



Noncommissioned officers Field Artillery, v. noncommissioned 

 officers. Infantry 



35.82 



(3) 



16.84 



(4) 



**22. 30 



(5) 



*12. 03 



(5) 



17.10 



(2) 



**58. 12 



(5) 



46.36 



(4) 



36.12 



(7) 



♦26. 86 



(3) 



*10. 03 



(1) 



37.60 



(8) 



51.43 



(3) 



8.33 



(2) 



6.66 

 (3) 



60.91 



(7) 



100.39 



(2) 



36.15 

 (2) 



25.67 



(8) 

 14.07 



(8) 

 12.38 



(8) 

 11.40 



(6) 

 4.36 



(6) 

 ♦24.40 



(8) 

 *14. 58 



(8) 

 29.40 

 ' (8) 

 19.77 



(7) 

 *6.66 



(4) 

 39.10 



(7) 

 26.30 



(8) 

 2.93 

 (7.5) 



6.05 



(5) 



62.03 

 (6) 



54.47 

 (8) 



23.86 

 (6) 



30.53 



(5) 

 14.79 



(5) 

 13.53 



(7) 

 15.73 



(3) 

 2.66 



(8) 

 40.13 



(7) 

 40.31 



(6) 

 43.68 



(5) 

 *32. 02 



(1) 

 **6.04 



(6) 

 55.19 



(4) 

 44.26 



(6) 



**2.93 



(7.5) 



5.93 

 (6) 



80.29 

 (3) 



85.19 

 (4) 



32.20 

 (4) 



46.85 



(1) 

 20.02 



(2) 

 16.68 



(6) 

 21.51 



(2) 

 3.98 



(7) 

 46.39 



(6) 

 35.79 



(7) 

 38.35 



(6) 

 28.57 



(2) 

 7.02 



(3) 

 41.71 



(6) 

 32.03 



(7) 

 **3.29 



(5) 



5.78 

 (7) 



56.83 

 (8) 



76.40 

 (5) 



**28.88 

 (5) 



32.28 



(4) 

 13.83 



(6) 

 28.02 



(4) 

 28.22 



(1) 

 4.59 



(5) 

 80.22 



(4) 

 61.92 



(1) 

 48.13 



(4) 

 *24. 93 



(5) 

 **6.52 



(5) 

 66.43 



(1) 

 47.73 



(5) 

 *10. 75 



(1) 



**7.59 

 (1) 



91.44 

 (2) 



65.87 

 (7) 



18.19 

 (7) 



The results of the treatment of the data from all camps are brought together in Tables 126, 

 127, and 128. 



