![]() ![]() ![]() ![]() If your two-sided test has a z-score of 1.96, you are 95% confident that that Variant Recipe is different than the Control Recipe. Z-scores are equated to confidence levels. What Does My Confidence Level Mean to Me in a Business Sense? We believe it’s just as important to know if your test is statistically underperforming as it is to know if it’s performing better than Control. With a one-sided test, you are only mathematically confident about one or the other, but never both. If you conduct a two-sided hypothesis test, you can be mathematically confident about whether or not your Variant Recipe is greater than or less than your Control Recipe. We use the Z-score calculator to test how far the center of the Variant bell curve is from the center of the Control bell curve. The Variant Recipe and all of the visitors in it make up a second bell curve. In A/B Testing terms, all of your visitors are observations, and the Control experience makes up a bell curve. Talk about how we can help with your Experimentation programĪ z-score is a standardized score that describes how many standard deviations an element is from the mean. Digital Analytics Platform Implementation. ![]()
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