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valid data science

online testing platform showing confidence interval.

Confidence intervals are a standard output of many free and paid A/B testing tools. Most A/B test reports contain one or more interval estimates.

Even if you’re simply a consumer of such reports, understanding confidence intervals is helpful. If you’re in charge of preparing and presenting those reports, it’s essential.

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How Much Data Do You Need to Be Data-Driven? [Rant]

Do you need to be a big company and need large volumes of traffic to be data driven?

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What’s on my mind

Hi, I'm Peep Laja—founder of CXL. I'm a former champion of optimization and experimentation turned business builder.

I do a lot of thinking, reading, and writing around business, strategy, and optimization. I send a weekly newsletter with what's on my mind on this stuff.

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