In this paper we provide a formal yet simple and straightforward proof of the asymptotic χ<Superscript>2</Superscript> distribution for Cochran test statistic. Then, we show that the general form of this type of test statistics is invariant for the choice of weights. This fact is important since in practice many such...</superscript>

OBJECTIVE: We sought to determine whether lesbians have higher rates of overweight and obesity than women of other sexual orientations.METHODS: We compared population estimates of overweight and obesity across sexual orientation groups, using data from the 2002 National Survey of Family...

We revisit the problem of sequential fixed-width interval estimation of the mean of a normal population. For a two-stage procedure, we derive an approximation to the coverage probability, when the variance has a known lower bound. Our approximation is more explicit than a recent result.