A/B Testing and sample size

First – go read Getting Real – it’s free (or $19 for the ebook/$25 for the treebook) and it’s a fantastic book for people who do web software in any capacity.

 

Now – A/B testing is something I’ve always wanted to be able to do with my products – but have yet to be able to do with any regularity because it requires a bit of technical magic to be able seperate your app that way.  

Anyhow – if you can test your design or features using A/B testing – here’s a great article from the 37signals team (authors of the above book):

http://37signals.com/svn/posts/3004-ab-testing-tech-note-determining-sample-size#extended

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