This would mean that leftists are more informed, and the right wing is more ignorant.
Depending on how you determine ignorance, I'm certain that your statement can be made true.
It could also be proven false.
Using a different set of questions to measure the knowledges of those being surveyed would result in an entirely different outcome.
I'm inclined to believe that if you asked 100 people technology and world history questions, those leaning to the left would do well, and the right would probably rank lower.
I'm also inclined to believe that if you asked those same 100 people how to do various jobs related more to lower class work and manual labor, you'll likely to fine that the right leaning people turn up far better informed.
The questions alone can be biased enough to make the whole survey worthless.
I don't see any way to spin this in favor of either Fox News or conservatism.
Of course you don't, you aren't a conservative person. Its not hard to figure that one out, you have a very narrow view of the world. That doesn't make you wrong, but it doesn't make you right, it does prevent you from seeing the world as it is however.
I could easily make a survey in which slashdot would show up as complete idiots on average and the 'ignorant right wing rednecks' would be the shown as geniuses. Its simply really, here goes:
Describe from your own personal experience what a vagina looks like.
Now, the girls on slashdot should get it right, and they'll be a couple guys who will, but the rest of you will fail utterly, proving slashdotters, who are clearly leaning to the left ... are ignorant.
Okay, so that was obviously wrong, but the point stands, change the subject matter of the survey and you'll get an entirely different answer that is just as correct as this one. Neither one of them will be 'wrong', the only part that gets it 'wrong' is the ignorant person that thinks the stupid survey is an accurate measure of the overall knowledge as person has.