The PISA test was given to large samples sizes in three American states. From the federal National Center for Educational Statistics:
| PISA 2012 | |||||
| Race / Ethnicity | Mean | Math | Science | Reading | |
| Massachusetts | |||||
| White | 538 | 530 | 545 | 540 | |
| Black | 467 | 458 | 466 | 476 | |
| Hispanic | 460 | 446 | 460 | 475 | |
| Asian | 578 | 569 | 580 | 584 | |
| Multiracial | NA | NA | NA | NA | |
| Connecticut | |||||
| White | 542 | 534 | 547 | 546 | |
| Black | 434 | 421 | 433 | 447 | |
| Hispanic | 456 | 442 | 463 | 463 | |
| Asian | 548 | 534 | 553 | 558 | |
| Multiracial | 512 | 496 | 520 | 521 | |
| Florida | |||||
| White | 512 | 499 | 520 | 518 | |
| Black | 429 | 413 | 425 | 449 | |
| Hispanic | 474 | 458 | 475 | 489 | |
| Asian | NA | NA | NA | NA | |
| Multiracial | 486 | 467 | 500 | 492 | |
| White-Black Gaps | |||||
| Massachusetts | 72 | 72 | 79 | 64 | |
| Connecticut | 109 | 113 | 114 | 99 | |
| Florida | 83 | 86 | 95 | 69 | |
| White-Hispanic Gaps | |||||
| Massachusetts | 78 | 84 | 85 | 65 | |
| Connecticut | 86 | 92 | 84 | 83 | |
| Florida | 38 | 41 | 45 | 29 | |
The standard deviation is supposed to be 100, so you can just put a decimal place in front of those gap numbers to convert them into rough z scores.
We can see patterns here that shouldn't be unexpected. Massachusetts, home to the education-industrial complex since 1636, has smart whites. Connecticut, home to the hedge fund industry, has smart whites.
Florida, not so much. Still, this would be a good time for an old anecdote about how Florida isn't wall-to-wall Parrot Heads. I had a girlfriend in college who went to the public high school in Cocoa Beach, FL (the town that was the setting for the 1960s sit-com I Dream of Jeannie). She told me she scored 1580 on the SAT (M+V, old-style). I exclaimed:
We can see patterns here that shouldn't be unexpected. Massachusetts, home to the education-industrial complex since 1636, has smart whites. Connecticut, home to the hedge fund industry, has smart whites.
Florida, not so much. Still, this would be a good time for an old anecdote about how Florida isn't wall-to-wall Parrot Heads. I had a girlfriend in college who went to the public high school in Cocoa Beach, FL (the town that was the setting for the 1960s sit-com I Dream of Jeannie). She told me she scored 1580 on the SAT (M+V, old-style). I exclaimed:
"You must have had the highest score in your high school!"
"Oh, no, I was fourth-highest."
"Fourth? Who were the other three? The children of rocket scientists?" (In my defense, this was a relatively new witticism in 1979.)
"Yes."
Massachusetts has pretty smart blacks, going back to Phillis Wheatley and W.E. Du Bois. Connecticut and Florida, not so much.
Florida has pretty smart Hispanics, although the wealthy Cubans and other rich Latin Americans are getting diluted more and more.