No I said 'population' which, in context again, refers to the mean of a Gaussian distribution. Certainly there are intelligent Blacks - in fact, some groups do well here in Britain too. But they tend to be elite-selected (the cream of the cream of the crop):
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"Swanknasty cited page 18 of this paper to claim that in 1979, first generation African immigrants had a mean of 12.2 years of education. Swanknasty felt this showed that they are not that highly selected since they are only a little more educated than high school graduates on average, but the African born immigrants surveyed in 1979 were roughly 36 years old and would have likely attended university around 1963. Figure 1 in this document, shows that in 1970, less than 1% of college age sub-Saharan Africans were enrolled in tertiary education. Further, in 1950 South Africa, only 0.5% of Africans even qualified for university. So being a bit more educated than a high school graduate in 1963 likely put African immigrants to Britain in the top 0.5% to top 1% of sub-Saharan Africans of their cohort. Normalizing the distribution, the African immigrants to Britain are 2.43 standard deviations (+2.43 SD) more educated than the average black African.
Assuming a 0.65 correlation between IQ and education (Jensen, 1998), we would expect their IQs to be 0.65(+2.43 SD) = +1.58 SD higher than the average black African. Assuming the sub-Saharan distribution has a mean of 67 and an SD of 15, that puts them at 91 (24 points above the African mean). This is probably a conservative estimate; those who migrate to Britain are not only way more educated than the average African, but were resourceful enough to escape a poor country and adapt to an unimaginably prosperous one. In addition, many of them, despite being born in Africa, probably achieved their education in the developed world, suggesting they met even higher standards than university students educated in sub-Saharan Africa."
The distribution of Blacks in general, on the other hand, is another matter. If you have read the literature on this topic you would have been aware that social justice warriors have been calling IQ psychologists "racist" for decades for reporting the fact that an average IQ difference persists between Blacks and Whites.
No one, not even the environmentalist side of the debate like Stephen Jay Gould (whose work "The Mismeasure of Man" is a standard in those circles) defending the idea that the difference is purely environmental in origin, denies that this difference exists. The only thing that is debated is the origin of the difference in how much it is attributable to genes vs. environment.
In 2013 there was an anonymous survey done on this issue that asked 1237 IQ researchers the question "Asked: What are the sources of U.S. black-white differences in IQ?"
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Here were the results:
0% of differences due to genes: (17% of our experts)
0-40% of differences due to genes: 42% of our experts
50% of differences due to genes: 18% of our experts
60-100% of differences due to genes: 39% of our experts
100% of differences due to genes: (5% of our experts)
M=47% of differences due to genes (SD=31%)
And I'll tell you a secret, boy, this issue is being studied with genomics as we speak, and it isn't looking too good for you. Recently people have started looking at GWAS hits for 'educational attainment,' a proxy for intelligence, and comparing the frequency of those gene hits in different populations. This is only the beginning of the endeavor but here is the predictable picture that is emerging:
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"The genetic variants identified by two large GWAS of educational attainment were used to test a polygenic selection model.
Average frequencies of alleles with positive (Beta) effect on the phenotype (polygenic scores) were compared across populations and racial groups using data from 1000 Genomes and ALFRED. Strong correlations between polygenic scores and population IQ were found (r>0.8). Moreover, the polygenic score obtained from the two independent GWAS exhibited a strong correlation (r= 0.83), even after pruning for linkage disequilibrium.
Factor analysis revealed that most alleles loaded on a single factor, which in turn was strongly correlated to population IQ.
Polygenic and factor scores survived control for phylogenetic autocorrelation, although the latter’s net effect on population was stronger (Betas= 0.361 and 0.861, respectively).
Results obtained from ALFRED data were similar and revealed a peak in polygenic and factor scores among East Asians (60.8% and 1.06, respectively) and a nadir among Africans and Native Americans (44.1% and 0.493)."