Methodology

Confidence Intervals

The parameter alpha is a one-sided significance level everywhere; .equivalent()'s displayed CI is (1-2α), not (1-α). This is to maintain consistency with the TOST (Two One-Sided Tests) equivalence testing method.

Examples:

• .equivalent()
  • alpha=0.05 → 90% CI
  • alpha=0.025 → 95% CI
• .change_greater_than() and .change_less_than()
  • alpha=0.1 → 90% CI
  • alpha=0.05 → 95% CI