[update: Unknown to me at the time of writing this post, Richard Lynn and Gerhard Meisenberg had already published a paper which utilized the referred to surveys in making national IQ estimates.]
For unknown reasons, Richard Lynn disregarded a number of regional tests when estimating national IQs. I pointed out previously that achievement test estimates can be made for 11 African nations that Lynn did not give achievement data for.
Following his methodology, I was able to estimate National IQs for an additional 7 Latin American countries (Cost Rica, Cuba, Ecuador, Guatemala, Nicaragua, Paraguay, and the Dominican Republic), based on the 2006 Second Regional Comparative and Explanatory Study (SERCE).
Column D below lists the averaged math and reading SERCE score for the countries. Column E lists Lynn’s school achievement estimates. Column F the differences, with an average of 74. Column G, the adjusted scores following the methodology of L & V (2012) page 17. Column H, the estimated IQ, using 500 as the international mean and 100 as the international standard deviation. Column I and J, Lynn’s direct scale achievement and final IQ estimates, respectively. And column K, Altinok & Murseli’s IQ equivalent estimates.
It can be seen that my estimated national IQs are reasonably in accordance with either or both Lynn’s and Altinok & Murseli’s. (Estimates based on one or even half of a dozen data points should not be reified. There is a large margin of error here.) With regards to Lynn’s estimates the major outlier is Cuba. Altinok & Murseli give a similarly high score based on the 1997 Latin American Laboratory for Assessment of the Quality of Education (LLECE). This estimated high National IQ accords with the findings discussed in the educational research literature.
Apparently neither communism nor a lack of non-Eurasian ancestry necessitates low national IQs, at least as indexed by achievement tests.