The scores for both tests are on a 500 point scale, with a designed standard deviation of 50. In the proceeding table, these are converted into IQ estimates with a mean of 97.4--corresponding to the national average NAEP scores of 283.62 for math and 266.02 for reading--and a standard deviation of 15. The math and reading scores are given equal weighting.
I'm operating under the presumption that the average IQ in the US is 98. The reason the IQ estimates are based on a national mean of 97.4 is to take into account private schools, whose students on average score 15 points higher on the math test and 19 points higher on the reading test, corresponding to an estimated 5.1 IQ advantage over their public school counterparts. Representing one-tenth of the school age population, this yields a national average of 98. The estimates assume that the private school advantage relative to public schools is equal across states. That is, the public school score, plus 5.1 multiplied by the percentage of a state's students enrolled in private schools, gives the state's overall estimated average IQ.
Again in the spirit of the 2004 IQ hoax, states are colored in accordance with the way their populations voted in the 2012 Presidential election. Light red (blue) indicates the margin of victory for Romney (Obama) was less than 10%; dark red (blue) indicates it was 10% or more:
|2. New Jersey||101.4|
|3. New Hampshire||101.0|
|14. North Dakota||99.1|
|20. South Dakota||98.8|
|27. Rhode Island||98.2|
|32. North Carolina||98.0|
|33. New York||98.0|
|40. South Carolina||96.7|
|47. West Virginia||95.0|
|48. New Mexico||94.7|
|51. District of Columbia||92.8|
And a map of the same. The darker the state's shading, the higher it's estimated average IQ:
Proximity to the Canadian border continues to show salubrious effects. Cold is good for the constitution, dontcha know!
The Department of Defense entry might reasonably be colored dark red rendering it, rather than Montana, the strongest showing among solidly GOP 'states'. Red-staters' creme de la creme in governmental positions, yikes!
This is the third set of IQ estimates I've comprised based on NAEP data. The inter-year correlations are strong, .91 between 2005 and 2009, and .97 (p-value = 1.6E-30) between 2009 and 2013. One state has shifted upwards markedly, however. Maryland was 34th in 2005, 11th in 2009, and 8th this time around. As those able to feed at the public trough eat ever more gluttonously, gentrifying out NAMs and white plebes, the scholastic performance of the entire state rises. It's almost as if our political masters behave privately in a way that is diametrically opposed to the diversifying ideals they sing paeans to in public!