How do homeschooled students compare to public school students in state test results?

How do homeschooled students compare to public school students in state test results?
While I don't have the specific answer, you should be able to find that and much more through one of the research links at the Homeschool Legal Defense Association: http://www.hslda.org/research/default.asp

By the way, I believe every homeschooler should join HSLDA.
I am homeschooled. When I took the state tests I was in the 97 percentile.