This is some fascinating insight. Do you think that the things being compared are [homeschooling] and [fighting grizzlies]?

I would say the interesting thing is the sudden increase over the last 5 years. Presumably, the number of Americans who think they can KO a grizzly bear is a lizardman constant situation in the surveys over time. But the number of people homeschooling is recently skyrocketing.

Given the subject of the thread and the comment I replied to: yes?

I suspect there is a lot of selection bias in that data. My hypothesis is that the homeschooled folks who take the ACT are more likely to do well on the ACT than the homeschooled folks who don't.

Isn't that true of public school kids who do/don't take the ACT as well?

My Title 1 school made the ACT available to all students for free (on one specific date). A lot of kids who were unprepared for the ACT took it because, why not?

We didn't have that at my school. Unless it's super widespread, it's probably not what's behind the different test results.