Browser for the smartest

IQLeague website has a funny case study.

Everyone is invited to take a short IQ test. Its results, as well as some user data (city, country, etc.), are recorded in the database. Further, after simple statistical frauds, one can single out, for example, a resident of Russia with the highest IQ.

And what is interesting, on the site you can see the statistical dependence of IQ on your browser and operating system. It looks like this:

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Don't take this seriously ;)