Optimizely rolled out a huge update to the way it handles statistics called Stats Engine last year. That update resolves the issues discussed in this article. You can read more about Stats Engine here: <a href="https:&#x2F;&#x2F;www.optimizely.com&#x2F;statistics&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.optimizely.com&#x2F;statistics&#x2F;</a>