>>13599823SA Khan 2015:-
http://www.jcdr.net/article_fulltext.asp?issn=0973-709x&year=2015&month=November&volume=9&issue=11&page=ZC10&id=6726Average IQ of school kids in villages near Lucknow in non-dental fluorosis regions was 110 and 100 overall (normal fluoride region and severe fluoride regions combined). Severe Fluoride contamination in water leads to a drop in IQ.
http://hrcak.srce.hr/file/44025IQ of Muslims in Aligarh city, Uttar Pradesh (Average IQ of 107) Year of norms is 1974 and the study was conducted in 2004, so FE correction is at least +0.54, so the corrected IQ is about 108.
IQ of Chennai, Tamil Nadu:-
Study 1:-
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3018494/IQ of 107 as a community sample. 4 zones in Chennai and 12 schools were selected randomly. The sample size is 717. 606 children belonged to families with less than 6500 INR monthly income. And 130 had illiterate mothers. If anything, the selection bias towards socio-economic status is downward. Year of norms is 1967 and the study was conducted in 2006, so FE correction is at the least -0.9, so the IQ is at least 106.1 (for socio-economically backward children).
IQ in 2 rural and 2 urban areas of Punjab:-
http://www.ijres.org/papers/Volume%204/v4-i7/Version-2/G4724854.pdfIQ in 2 rural areas is 96.2, 90.4. And 2 urban areas is 102, 106. IQ grades are available (0 to 10th percentile, etc.). An online statistical tool is required to read.
It was measured in 2016 and year of norms is 1979, so the FE correction is at least +2.47, so the corrected IQs in rural areas are at least 98.7, 92.7 and in urban areas are at least 104.5, 108.5.