A quick post on crime and test scores

To further extend my California test score series, I decided to compare crime rates at a county level to test scores (English Grade 11) for all test takers.

Violent Crime Rate


[Un-weighted correlation: -0.38]

Homicide Rate


[Un-weighted correlation: -0.40]

Aggravated Assault Rate


[Unweighted correlation: -0.48]

Burglary Rate


[Unweighted correlation: -0.50]

Property Crime Rate


[Unweighted correlation: -0.19]

These correlations are significantly stronger with test scores than they are with overall county racial/ethnic demographics (e.g., percent black, percent white, etc), about 2x in fact, so I don’t think this is being driven purely by underlying differences in test scores between racial groups.


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