Saturday, March 05, 2011


Longhorns 17, Badgers 1
...Perhaps because a state's "average ACT/SAT" is, for all intents and purposes, a proxy for the percent of white people who live there. In fact, the lion's share of state-to-state variance in test scores is accounted for by differences in ethnic composition. Minority students - regardless of state residence - tend to score lower than white students on standardized test, and the higher the proportion of minority students in a state the lower its overall test scores tend to be.

Please note: this has nothing to do with innate ability or aptitude. Quite to the contrary, I believe the test gap between minority students and white students can be attributed to differences in socioeconomic status. And poverty. And yes, racism. And yes, family structure. Whatever combination of reasons, the gap exists, and it's mathematical sophistry to compare the combined average test scores in a state like Wisconsin (4% black, 4% Hispanic) with a state like Texas (12% black, 30% Hispanic).

So how to compare educational achievement between two states with such dissimilar populations? In data analysis this is usually done by treating ethnicity as a "covariate." A very simple way to do this is by comparing educational achievement between states within the same ethnic group. ...

...Perhaps because a state's "average ACT/SAT" is, for all intents and purposes, a proxy for the percent of white people who live there. In fact, the lion's share of state-to-state variance in test scores is accounted for by differences in ethnic composition. Minority students - regardless of state residence - tend to score lower than white students on standardized test, and the higher the proportion of minority students in a state the lower its overall test scores tend to be.

Please note: this has nothing to do with innate ability or aptitude. Quite to the contrary, I believe the test gap between minority students and white students can be attributed to differences in socioeconomic status. And poverty. And yes, racism. And yes, family structure. Whatever combination of reasons, the gap exists, and it's mathematical sophistry to compare the combined average test scores in a state like Wisconsin (4% black, 4% Hispanic) with a state like Texas (12% black, 30% Hispanic).

So how to compare educational achievement between two states with such dissimilar populations? In data analysis this is usually done by treating ethnicity as a "covariate." A very simple way to do this is by comparing educational achievement between states within the same ethnic group. ...

...White and Hispanic Texas students indeed seem to dropout at a higher rate than their counterparts in Wisconsin, although in both cases (a) the difference is not statistically significant; and (b) in both cases, both states are significantly below the national average. Among black high school students, Texans have significantly lower dropout rates than their national cohort and Wisconsinites. Black high school students in Wisconsin have significantly higher dropout rates than national....