https://www.intelligence-humaine.co...n-Intelligence-second-edition-2015-1.pdf

Go to chapter 4 and see 4 pages of fine print of all the studies of IQ is sub Saharan Africa.
It is an IQ of 70 and it has been tested many times.

That is better than Aborigines at 60 or pygmies at 55, but not as good as Jews at 110.

There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
The man who makes no mistakes does not usually make anything.-- Edward John Phelps