Mean IQ estimates by state using 2013 8th grade math and reading NAEP assessment data:
State | IQ |
1. Massachusetts | 103.9 |
2. New Jersey | 102.8 |
3. New Hampshire | 102.3 |
4. Vermont | 102.2 |
DoDEA | 101.7 |
5. Minnesota | 101.3 |
6. Washington | 100.6 |
7. Pennsylvania | 100.6 |
8. Montana | 100.4 |
9. Colorado | 100.3 |
10. Maryland | 100.3 |
11. Connecticut | 100.2 |
12. Wyoming | 100.0 |
13. Ohio | 99.9 |
14. North Dakota | 99.8 |
15. Maine | 99.7 |
16. Idaho | 99.5 |
17. Kansas | 99.4 |
18. Wisconsin | 99.4 |
19. Virginia | 99.3 |
20. South Dakota | 99.2 |
21. Indiana | 99.1 |
22. Utah | 99.0 |
23. Nebraska | 99.0 |
24. Iowa | 99.0 |
25. Oregon | 98.5 |
26. Illinois | 98.5 |
27. Texas | 98.4 |
28. Rhode Island | 98.2 |
29. Kentucky | 98.2 |
30. Missouri | 98.1 |
31. North Carolina | 98.1 |
32. Delaware | 97.7 |
33. New York | 97.7 |
34. Florida | 97.4 |
35. Michigan | 97.3 |
36. Georgia | 96.8 |
37. Tennessee | 96.7 |
38. Alaska | 96.5 |
39. South Carolina | 96.2 |
40. Hawaii | 96.2 |
41. Arizona | 96.0 |
42. Nevada | 96.0 |
43. Arkansas | 95.9 |
44. Oklahoma | 95.5 |
45. California | 95.4 |
46. West Virginia | 94.2 |
47. Louisiana | 93.9 |
48. New Mexico | 93.6 |
49. Alabama | 93.2 |
50. Mississippi | 92.6 |
51. District of Columbia | 90.2 |
And the same but with only non-Hispanic white students considered:
State | IQ |
1. District of Columbia | 111.6 |
2. Massachusetts | 107.0 |
3. New Jersey | 105.8 |
4. Maryland | 104.8 |
5. Colorado | 104.2 |
6. Connecticut | 104.2 |
7. Texas | 104.1 |
DoDEA | 104.1 |
8. Minnesota | 103.9 |
9. Pennsylvania | 103.5 |
10. Washington | 103.3 |
11. Illinois | 102.8 |
12. New Hampshire | 102.8 |
13. Vermont | 102.5 |
14. Virginia | 102.4 |
15. New York | 102.4 |
16. Montana | 102.2 |
17. North Carolina | 102.2 |
18. Alaska | 101.9 |
19. Wisconsin | 101.9 |
20. Rhode Island | 101.9 |
21. Kansas | 101.7 |
22. Ohio | 101.7 |
23. Delaware | 101.7 |
24. Nebraska | 101.6 |
25. California | 101.6 |
26. Arizona | 101.5 |
27. Georgia | 101.4 |
28. South Dakota | 101.3 |
29. Florida | 101.2 |
30. North Dakota | 101.2 |
31. Idaho | 101.1 |
32. Utah | 101.1 |
33. Hawaii | 101.1 |
34. Indiana | 101.0 |
35. Wyoming | 101.0 |
36. Oregon | 101.0 |
37. South Carolina | 100.7 |
38. Nevada | 100.5 |
39. Missouri | 100.4 |
40. New Mexico | 100.3 |
41. Iowa | 100.3 |
42. Maine | 100.0 |
43. Michigan | 99.6 |
44. Kentucky | 99.4 |
45. Arkansas | 99.0 |
46. Tennessee | 98.9 |
47. Louisiana | 98.8 |
48. Mississippi | 98.2 |
49. Oklahoma | 97.9 |
50. Alabama | 97.3 |
51. West Virginia | 94.3 |
* Firstly, I dispensed with the attempted private school adjustments that were a consequence of me trying to be clever by adding an unnecessary wrinkle to the scores, one that I ported from the first set of estimates I put together nearly a decade ago. The NAEP reports that it tests a representative sample of private and public school students from each state, so that's what we should go with.
Secondly, while the NAEP tests were originally designed to have a 50 point standard deviation on a 500 point scale, over the last several years the SDs have been narrower than 50. They vary slightly by year, subject, and grade, but the national sample SDs for 2013 were 37 for math and 34 for reading. As a consequence, there is more variance in estimated IQ among the top and bottom states. The relative difference between states remains essentially unchanged--this is a 'cosmetic' upgrade.
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