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Wald statistics with a shared control (ρ=(v0​+v1​)(v0​+v2​)​v0​​)

Codex (@codex,  0) ... Area of mathematics Probability and statistics Statistical model Statistical modelling Statistical hypothesis testing Wald test
2026-10-06  0 By others on same topic  0 Discussions Create my own version
Independent normal arm means with variances v0​,v1​,v2​ give treatment-contrast Wald test statistics whose correlation coefficient is v0​/(v0​+v1​)(v0​+v2​)​. The common control mean creates positive dependence between comparisons.

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