Estimating Prey Preference by Predators: Uses of Various Indices, and a Proposal of Another Based on χ2
Estimating Prey Preference by Predators: Uses of Various Indices, and a Proposal of Another Based on χ2
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估计捕食者的猎物偏好：各种指数的使用以及另一个基于 χ2 的建议
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发表时间：
1982
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通讯作者：
S. Pearre
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作者：
S. Pearre
一个真正有用的猎物选择指数应该是统计上可检验的。2 × 2列联表公式提供了一种简单的方法来检验任何样本量下任何选择程度的显著性。 一个从-1到+1的指数，如果没有选择则为零，可以简单地从卡方公式推导出来。讨论了生物统计学教材中一些相互矛盾的用法，以及其他常用指标的有用性和局限性.关键词：选择，指标，卡方，精确检验，猎物
A really useful prey-selection index should be statistically testable. A 2 × 2 contingency table formulation provides a simple way to test the significance of any degree of selection at any sample size. An index ranging from −1 to +1, and zero-valued for no selection, can be simply derived from the chi-square formulation. Some conflicting usages in biological statistics texts are discussed, as well as the usefulness and limitations of other commonly used indices.Key words: selection, index, chi-square, exact test, prey