Alex Birkett

Outliers in statistics

Outliers are unusually high or low observations that sit far from the rest of a dataset. In A/B testing, a small number of extreme values can materially change averages, variance, confidence intervals, and the conclusion you draw from a test.

This matters particularly for revenue metrics such as average order value and revenue per visitor, where a handful of unusually large purchases can have a disproportionate effect.

An outlier is not automatically bad data. It might be a recording error, unusual customer behavior, or a genuinely valuable segment. The important part is identifying it, understanding why it occurred, and deciding how it should be handled before it distorts your analysis.

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Apple Store

Perception isn’t always the same thing as reality, even when it comes to something as “objective” as your product’s value.

In fact, the perceived value of your product is fairly malleable. There are countless studies, as well as anecdotes, that support the notion that you can tweak small things to increase your product’s value perception.

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A hero image is the large, prominent visual that appears at the top of a webpage, usually alongside the headline, value proposition, and primary call to action. A good hero image helps visitors understand what you offer, who it’s for, and why it matters. It can show the product, demonstrate an outcome, provide context, or build credibility.

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