关于A/B testing的三篇博文，…

1.
Behind the scenes: Highrise marketing site A/B testing part
1    http://37signals.com/svn/posts/2977-behind-the-scenes-highrise-marketing-site-ab-testing-part-1
2.
Behind the scenes: A/B testing part 2: How we test
http://37signals.com/svn/posts/2983-behind-the-scenes-ab-testing-part-2-how-we-test
3.
Behind the scenes: A/B testing part 3: Finalé
http://37signals.com/svn/posts/2991-behind-the-scenes-ab-testing-part-3-final