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Data & Analytics · Foundational

Alternative Hypothesis (H1)

The claim that there is an effect or difference, accepted when the null hypothesis is rejected.

Definition

H1 can be two-sided (≠) or one-sided (> or <), which determines whether the test is two-tailed or one-tailed.

Example

H1: the new page's conversion rate is higher.

Exam tip

The direction of H1 decides a one-tailed versus two-tailed test.

Related terms