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Inferential Statisticshard
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Which condition is necessary for the Wald test statistic W=(θ^−θ0)2Var(θ^)W = \frac{(\hat{\theta} - \theta_0)^2}{Var(\hat{\theta})}W=Var(θ^)(θ^−θ0​)2​ to follow a χ12\chi^2_1χ12​ distribution in large samples?