Phelps-Stokes fellowship studies . in the mean ag2s o the two groups. The mean standarddeviation for the whites is while that of the negroes is latter group deviates more from the norm than the former. Fig. 1 showing the distribution of C. for negroes and whites,graphically shows much overlapping in the frequency curves. Thegreatest number of frequencies occurring for the whites is 3; butthat of the negroes 4. The frequencies seem fairly well distributed,however the range of the whites is greater. This is due to 1 ex-treme case in the white group, that of 17 years and
Phelps-Stokes fellowship studies . in the mean ag2s o the two groups. The mean standarddeviation for the whites is while that of the negroes is latter group deviates more from the norm than the former. Fig. 1 showing the distribution of C. for negroes and whites,graphically shows much overlapping in the frequency curves. Thegreatest number of frequencies occurring for the whites is 3; butthat of the negroes 4. The frequencies seem fairly well distributed,however the range of the whites is greater. This is due to 1 ex-treme case in the white group, that of 17 years and above. (?Graphs drawn by Mr. Fain.) TABLE 4 Test I.—Intelligence (Raw Score) Group B- -Whites Group A— -Negroes No. ofCases Me-dian Me-in ^*^^-^^^^-^ ard Dev. No. of Me-Cases dian Mean Stand-ard Dev. 47 44 42 47 22 20 Comparison of Intelligence. Table 4 shows the mean intelli- FiG. 2. Graph representing the distribution of scores in Intelligence for both groups, negroes ajid whites. Upper, Negroes; Lower, Ei:::4i::,iilfll;:= ^ nh A p ^ f lO 20 30 40 50 60 27 gence score lor the negroes to be 20 (median 22), while that ofthe whites is 42 (median 44). The standard deviation for the ne-groes is ; that of the whites is A difference in standarddeviation of , that of the whites being the greater. The sig-nificant thing is that the per cent of the negroes reaching the meanscore of the whites is zero, the highest score for the negroes being40, whereas the mean for the whites is 42. Only per cent ofthe negroes reach or exceed the first quartile (32) of the distributions of scores for these two groups in intelligenceare shown more graphically in Fig. 2. Tliere is some overlapping,but note the range of the negro curve, the greatest score is 4 0 orabout 65 per cent of the highest score for the whites. In the dis-tribution here we have about 8 7 per cent of the negroes falling inthe first quartile of the whites. TABLE 5Test II Acliieven
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