No females took the exam in Mississippi (1 exam taken), Montana (11 exams taken), and Wyoming (no exams).
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For states that had some females take the exam the percentage female ranged from 3.88% in Utah (4 out of 103) to 29% in Tennessee (73 out of 251). However, 30 of Tenn females can be attributed to a girls only school that offers AP CS A.
11 states had no Black students take the exam: Alaska (21 exam takers -4.3% Black by population), Idaho (47 - 0.9% Black), Kansas (47 - 6.2% Black), Maine (161 - 1.0%), Mississippi (1 - 37.3%), Montana (11 - 0.67%), Nebraska (46 - 4.5%), New Mexico (57 - 3%), North Dakota (9 - 1%), Utah (103 - 1.2%), and Wyoming (0 - 1.2%).
Why isn't this a story? Is there any research into this? Is there an effect here that we should be looking for?