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Statistics about a software usage.

3 votes
Accepted

Statistics and Usability

Why Statistics? … This branch of statistics is called “inferential statistics.” …
Michael Zuschlag's user avatar
3 votes

How can i interpret the observed difference in a/b test?

You are correct that a significant null hypothesis result only tells you that A and B are different, but it doesn't quite tell you how different they could reasonably be, given the sample size and var …
Michael Zuschlag's user avatar
21 votes

A/B testing - client wanted the test run 70/30

Your statistical power is maximized if equal numbers of users are directed to A and B. That is, assuming one design really is better than the other, you’ll achieve statistical significance with the sm …
Michael Zuschlag's user avatar