494 



MEMOIES NATIONAL ACADEMY OF SCIENCES. 



[Vol. XV, 



Section 4. — Comparison oj branches oj the service. 



Table 148 presents data on enlisted men of the various branches of the service. All 

 figures of this table have been obtained on the assumption that those segregated as "illiterate" 

 may be treated as falling in the lower half of the distribution and the complete groups thus 

 compared. The percentages eliminated as "illiterate" have been noted for each group, chiefly 

 for their value as indicative of the extent to which any given group was examined by a. 

 Within any given camp these figures doubtless indicate roughly the relative degrees of illit- 

 eracy of the various branches, in accordance with the standards of literacy set up for the camp 

 in question (see pp. 473 ff.). Exception to this statement should be noted in the case of the 

 Engineers at Camp Dix. Figures for this group regarding percentages eliminated as illiterate 

 are not comparable with those for other branches at this camp, since the Engineers weie 

 examined with an exceptionally high degree of thoroughness, and men who would ordinarily 

 have been segregated from the rest were retained in group examination a. 



By reference to table 148, comparison of the various branches may be made on the basis 

 of median scores, upper quartiles, or percentages of superior (A and B) cases. Slightly different 

 results would be obtained according as one or another of these measures is used, though they 

 do not differ widely in direction. We shall use the median as the main basis of comparison. 

 The relative excellence of the various branches within the several camps may be obtained 

 readily from table 148. Comparison of the general trend of these results, as influenced by 

 the data from all four camps, is further facilitated by figure 4. 



Table 148. — Examination a — Comparison of branches of the service by camps — Enlisted men (white) — Computations based 



on all cases, including illiterates. 



Camp and branch of service. 



Number 

 of cases. 



Percentage 

 eliminated 



as 

 "illiterate.'' 



Median: 

 Md. 



Upper 

 Quartile: 



Range: 

 Q.3 to Md. 



Percentage 

 A and B. 



Devens: 



Infantry 



Machine Gun Battalions 



Field Artillery 



Engineers 



Field Signal Battalion 



Sanitary Train 



Supply Train 



Ammunition Train 



Dix: 



Infantry 



Machine Gun Battalions 



Field Artillery 



Engineers 



Field Signal Battalion 



Sanitary Train 



Lee: 



Infantry 



Machine Gun Battalions 



Field Artillery 



Engineers 



Field Signal Battalion 



Sanitary Train 



Ammunition train 



Taylor: 



Infantry 



Machine Gun Battalions 



Field Artillery 



Engineers 



Field Signal Battalion 



Sanitary Train 



Supply Train 



Ammunition Train 



All four camps (based on actual totals): 



Infantry 



Machine Gun Battalions 



Field Artillery 



Engineers 



Field Signal Battalion 



Sanitary Train 



Supply Train (2) 



Ammunition Train (3) 



All four camps (based on averages of percentages): 



Infantry 



Machine Gun Battalions 



Field Artillery 



Engineers ■ 



Field Signal Battalion 



Sanitary Train 



Supply Train (2) 



Ammunition Train (3) 



10,032 



1,402 



3,451 



1,276 



293 



688 



316 



745 



4,325 



744 



2,076 



1,183 



178 



458 



13,077 



1,287 



4,552 



1,266 



168 



441 



975 



5,992 

 954 



1,820 

 858 

 330 

 629 

 139 

 402 



33, 426 

 4,387 

 11,899 

 4.583 

 969 

 2,216 

 455 

 2,122 



22.2 

 20.8 

 22.0 

 15.1 

 2.1 

 6.1 

 14.0 

 18.3 



10.3 

 10.3 

 4.0 

 3.1 

 0.6 

 5.9 



18.5 

 13.8 

 16.0 

 23.5 

 .0 

 .9 

 17.8 



fi.2 



5.0 



1.8 



1.5 



.0 



3.0 



.0 



.5 



16.3 

 13.5 

 13.5 

 11.8 

 .7 

 4.2 

 9.7 

 14.8 



14.5 

 12.5 

 11.0 

 10.8 

 .7 

 4.0 

 7.0 

 12.3 



152 

 137 

 164 

 164 

 2.53 

 188 

 163 

 166 



164 

 151 

 179 

 156 

 233 

 192 



110 

 131 



106 

 128 

 219 

 190 

 141 



148 

 154 

 170 

 193 

 244 

 205 

 119 

 153 



137 

 142 

 147 

 160 

 240 

 194 

 147 

 152 



144 

 143 

 157 

 163 

 237 

 194 

 138 

 153 



218 

 198 

 226 

 235 

 299 

 246 

 209 

 231 



229 

 206 

 239 

 221 

 292 

 251 



181 

 198 

 171 

 204 

 268 

 242 

 213 



207 

 205 

 221 

 258 

 290 

 261 

 172 

 216 



205 

 201 

 212 

 229 

 290 

 251 

 203 

 220 



211 



201 

 220 

 231 

 288 

 250 

 196 

 220 



66 

 61 

 62 

 71 

 46 

 58 

 45 

 65 



65 

 55 

 60 

 65 

 59 

 59 



71 

 67 

 65 

 76 

 49 

 52 

 72 



59 

 51 



51 

 65 

 46 

 56 

 53 

 63 



68 

 59 

 65 

 69 

 50 

 57 

 56 

 68 



67 

 58 

 63 

 68 

 51 

 56 

 58 

 67 



15.2 

 11.1 

 18.1 

 20.6 

 50.9 

 23.6 

 13.9 

 17.0 



17.9 

 13.2 

 20.7 

 16.6 

 42.1 

 25.6 



9.5 

 10.0 



7.8 

 12.5 

 35.1 

 21.5 

 13.6 



12.1 

 11.0 

 14.2 

 27.4 

 46.9 

 30.1 

 5.0 

 14.4 



12.8 

 11.1 

 14.0 

 18.6 

 45.2 

 25.4 

 11.1 

 14.9 



13.7 

 11.3 

 15.2 

 19.3 

 43.8 

 25.2 

 9.5 

 15.0 



