I found another test that's more comprehensive. It has lots more questions, lets you give a confidence estimate for each, and tells you how well calibrated you are at 0% to 100% probability. And it notes both underconfidence and overconfidence.
http://www.projectionpoint.com/test1.php
I got a 78 out of 100.
I got 73.
I didn't find this test as good as the other one:
1) In the estimating test, you have to figure out things in a void, with no clue from the question. But in this test, if the question is whether Sarah Blogg was Humphrey Bogart's second wife, my estimate goes from 0.00001% to 50%. So I often find myself guessing whether it's a trick question.
2) The results don't seem to take accuracy into account, meaning you might get perfect score by answering "50%" on all question (I haven't tried). Seeing a log scoring system would be better. (But then I didn't dig too much for their formula)
3) Their graph is ugly. The vertical don't line up with the numbers at the bottom! Geez!
So you think its important to be able to estimate how well you are estimating something? Here is a fun test that has been given to plenty of other people.
I highly recommend you take the test before reading any more.
http://www.codinghorror.com/blog/2006/06/how-good-an-estimator-are-you.html
The discussion of this test at the blog it is quoted in is quite interesting, but I recommend you read it after taking the test. Similarly, one might anticipate there will be interesting discussion here on the test and whether it means what we want it to mean and so on.
My great apologies if this has been posted before. I did my bast with google trying to find any trace of this test, but if this has already been done, please let me know and ideally, let me know how I can remove my own duplicate post.
PS: The Southern California meetup 19 Dec 2010 was fantastic, thanks so much JenniferRM for setting it up. This post on my part is an indirect result of what we discussed and a fun game we played while we were there.