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A/B Test Design

Design a statistically honest A/B test: hypothesis, primary metric, sample size reality-check, and the decision rule agreed before launch.

Design an A/B test for: {{change}} (what we're changing, current baseline numbers, traffic volume).

Spec: the hypothesis ('changing X will move Y because Z'), primary metric (ONE — everything else is secondary or guardrail), guardrail metrics (what must not degrade), sample-size reality check — with my traffic and baseline, how long to detect a {{effect_size}} lift? (If the answer is months, say so and suggest a bigger-effect test instead), randomisation unit and contamination risks, the decision rule written BEFORE launch (ship if X, kill if Y, extend if Z), and the 3 ways this test could mislead (novelty effect, seasonality, peeking) with countermeasures.

Fields like {{ this }} are placeholders — replace them with your own details, or let Aria ask you for them.

experimentation ab-testing statistics

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