Differences in exam performance between pupils attending selective and non-selective schools mirror the genetic differences between them

EduYears GPS plotted means (and 95% confidence intervals) between state non-selective, grammar and private school students. Note: There were significant EduYears GPS mean differences between state non-selective school students and both grammar (t？=？4.869, p？<？0.001; d？=？0.413) and private school students (t？=？7.170, p？<？0.001; d？=？0.372). There was not a significant difference between grammar and private school students (t？=？0.436, p？=？0.659