Educability-and-Group-Differences-1973-by-Arthur-Robert-Jensen

64 Educability and Group Differences
Lowest percent of failures in any state:
White = 0-6 percent (Rhode Island)
Negro = 7-4 percent (Wisconsin)
Sigma difference = l*06cr ~ 15-9 IQ points.
Second-lowest percent of failures in any state:
White = 0-9 percent (Minnesota)
Negro = 11*1 percent (California)
Sigma difference = l-29cr c* 19-4 IQ points.
Comparison of highest white and lowest Negro failure rates:
Highest white = 9-7 percent (Tennessee)
Lowest Negro = 7-4 percent (Wisconsin)
Sigma difference = 0-15er ~ 2-25 IQ points (in favor of
Negroes).
Comparison of lowest white and highest Negro failure rates:
Lowest white = 0-6 percent (Rhode Island)
Highest Negro = 46-7 percent (Mississippi)
Sigma difference = 2-43a ~ 36*45 IQ points.
Comparison of second-highest white and second-lowest Negro
failure rates:
Second-highest white = 9-4 percent (Kentucky)
Second-lowest Negro = 11*1 percent (California)
Sigma difference = 0*11 o ~ 1-65 IQ points (in favor of
whites).
Thus, we see that in contrast to the data noted by Klineberg
from World War I, when the Negro medians of four Northern
states exceeded the white median of four Southern states, in
1968 there are only two pairs of states (Tennessee and Wisconsin,
and Kentucky and Wisconsin) in which Negroes obtain higher
AFQT scores, on the average, than whites. In this 1968 sample,
the mean score of white males in Tennessee would correspond
to 95, i.e., 5 points below the whites’ national average, on an IQ
scale, while the mean score of Negro males in Wisconsin would
be 97*25, i.e., nearly 13 points above the Negroes’ national average.
Since the AFQT is clearly predictive of individuals’ capabilities
in learning and performance in the armed forces, the above figures