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#advertising testing

All blog materials tagged with "advertising testing" Cases, analyzes and practical guides from Daniil Pustovalov - Digital Marketing Lead.

A/B testing in marketing 2026: how not to waste your budget on false insights
PerformanceOctober 15, 20259 min

A/B testing in marketing 2026: how not to waste your budget on false insights

80% of A/B tests in marketing produce a false positive result due to insufficient statistical power. How to calculate sample size, when to stop a test, how to prioritize hypotheses. With formulas and real cases.