How Not To Run an A/B Test
By Evan Miller April 18, 2010 Translations: Russian Spanish Uzbek If you run A/B tests on your website and regularly check ongoing experiments for significant results, you might be falling prey to what statisticians call repeated significance testing errors. As a result, even though your dashboard says a result is statistically significant, there’s a good chance that it’s actually insignificant.
How Not To Sort By Average Rating
By Evan Miller February 6, 2009 (Changes) Translations: Dutch Estonian German Russian Ukrainian PROBLEM: You are a web programmer. You have users. Your users rate stuff on your site. You want to put the highest-rated stuff at the top and lowest-rated at the bottom. You need some sort of “score” to sort by. WRONG SOLUTION #1: Score = (Positive ratings) − (Negative ratings) Why it is wrong: Supp
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