Estimating the IQ of Charles Murray
According to pumpkinperson the mean and SD of the SAT at this time was about 778/240. This SAT score corresponds to a z-score of 2.7. The eduttainment score for when he got a PhD (1974) would be roughly 2.05 using the jensen method/eduyears spreadsheet.
Putting this all into a simulation assuming IQ/SAT cor of 0.84 and IQ/edattain cor of 0.55 returns a value of 136 with an SE of 8
g <- rnorm(60000000)
ls <- 0.84*g + rnorm(60000000)*sqrt(1-0.84^2)
cs <- 0.55*g + rnorm(60000000)*sqrt(1-0.55^2)
subby1 <- data.frame(ls, cs)
subby1$g = g
subby2 <- subset(subby1, (subby1$ls < 2.8 & subby1$ls > 2.62) & (subby1$cs > 1.95 & subby1$cs < 2.05))
mean(subby2$g)
sd(subby2$g)