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Average test score in mathematics and science vs. GDP per capita, 2016

Shown on the x-axis are Hanushek and Woessmann's combination of scores from international student achievement tests. The scores are standardized to the PISA
test scale, so that the OECD countries have a mean of 500 and a standard deviation of 100. The test scores are here plotted against GDP per capita in 2016, but the
test scores are not from a particular year, and instead are the average of all standardized math and science test scores each country participated in.

Average test score in math and science, primary through end of secondary school in 2016350400450500GDPpercapita(int.-$)ChinaChinaIndiaIndiaIndonesiaIndonesiaBrazilBrazilNigeriaNigeriaJapanJapanEgyptEgyptThailandThailandFranceFranceItalyItalySouth AfricaSouth AfricaSpainSpainMoroccoMoroccoSerbiaSerbiaAlbaniaAlbaniaAfricaAsiaEuropeNorth AmericaOceaniaSouth America