the blog quebecois

Mike On Ads will guess your sex, weight and age, or give you a free stuffed animal!

OK, I was kidding about the weight and age. Also, the free stuffed animal is probably off the table, too.

But he's serious about the sex thing. What he does is query (following your permission) your browser's recent history and compares sites viewed against Quantcast's extensive demographics profiling.

Then a bit of arithmetical magic:

So what I did is I modified the SocialHistory JS so that it polled the browser to find out which of the Quantcast top 10k sites were visited. I then apply the ratio of male to female users for each site and with some basic math determine a guestimate of your gender. The math is really quite simple, I just take: 1 / (1 + r_1 * r_2 * … * r_n)

where p_i is the ratio of men-to-women for the specific site. For example, if you had been to two sites that had a 2-1 ratio of men to women, the probability of you being female would be:
1 / (1 + 2 * 2) = 1/5 = 20%%

Site Male-Female Ratio google.com 0.98 flickr.com 1.15 digg.com 1.56 azlyrics.com 0.79 drudgereport.com 2.08 gizmodo.com 2.08 ultimate-guitar.com 1.25 breitbart.com 1.94 google.ca 1.33 lifehacker.com 1.63 metafilter.com 1.27 musiciansfriend.com 1.86 boingboing.net 1.5 colostate.edu 0.92 reddit.com 1.33 fark.com 1.82 bugmenot.com 2.03 nationalreview.com 1.74 mentalfloss.com 0.75

leading to the conclusion:

Likelihood of you being FEMALE is 0% Likelihood of you being MALE is 100%

No stuffed animal for me. (And being 100% MALE, why would I want one anyway?)

Via The Presurfer