One-Tailed Vs. Two-Tailed Tests | Towards Data Science

Choosing between one- and two-tailed hypotheses affects every stage of A/B testing. Learn why the hypothesis direction matters and explore the pros and cons of each approach.

By Noble Pilot · March 16, 2026 · 1 min read

One-Tailed Vs. Two-Tailed Tests | Towards Data Science

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ab testing
alternate hypothesis
data analysis
hypothesis testing

Source: Towards Data Science

Choosing between one- and two-tailed hypotheses affects every stage of A/B testing. Learn why the hypothesis direction matters and explore the pros and cons of each approach.