From AFA Journal:
Pew Research revealed in a December 2016 report titled “Religion and Education Around the World” that educational attainment varies by religion. Overall, Jews and Christians are the most educated. On average, Jews receive 13.4 years of formal schooling, Christians 9.3 years, Buddhists 7.9 years, and Muslims and Hindus 5.6 years. Those with no religious affiliation have 8.8 years of schooling. Among Muslims and Hindus, two out of five have no formal schooling. Religious groups in the same regions of the world still may show distinct disparity in educational levels – such as in sub-Saharan Africa where Muslims are more than twice as likely as Christians to have no formal education.