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The sampling distribution of the W estimator of the number of valid signatures on a petition

机译:申请中有效签名数量的W估计的抽样分布

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A new non linear estimator, W, for the number of valid, unique signatures on a petition has been shown better, for the cases enumerated and with certain restrictions, than a popular Goodman-type statistic, G. This article extends those results with relaxed conditions by developing the exact probability mass function and mean of W and a close approximation of the variance (Var(W)). If the proportion of valid signatures among unique and duplicated signatures is the same, then Var(W) is approximately a function of the means and variances of the two sample statistics. Using the delta method, we estimate Var(W), with the resulting approximation shown to be good, even when the condition of equal proportions does not hold. We compare W to G and establish which estimator is preferred for different intervals of the design parameters. Data from a Washington State petition illustrate the findings.
机译:一个新的非线性估算器W,对于请愿书的有效,独特的签名的数量更好,对于案件枚举和某些限制,而不是流行的Goodman型统计,G.本文将这些结果扩展到放松通过开发精确的概率质量功能和W的均值和方差的近似的条件(var(w))。如果唯一和重复的签名之间的有效签名的比例是相同的,则VAR(W)大致是两个示例统计的方法和差异的函数。使用Delta方法,我们估计Var(W),结果近似显示为好,即使当同等同的条件不保持。我们比较W到G,并确定设计参数不同间隔的估算器是优选的。来自华盛顿州申请的数据说明了发现。

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