Top Tricks to Make Your Zotero More Powerful

Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share your research sources. It support a wide range of documentation types from papers to presentations, from web pages to notes and drafts. A SQLite database and online storage (yet with limited space) are used to store and index the citation information of each resour...

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统计中的样本检验基础和R实践

本文总结了R in Action一书中提到的关于样本检验的内容,以概要的形式提供给读者以及自己参考。 注: H0表示空假设,即样本检测的假设对象。 独立性检验(列联表) 卡方检验:H0:假设二维表的行和列变量相互独立。stats包的*chisq.test() Fisher精确检验: H0:边界固定的二维列联表行和列独立。stats包的*fisher.test() Cochran-Mantel-Haenszel检验:*H0:两个名义变量在第三个变量的每一层中都是条件独立的。stats包的.test() 相关性检验 常用系数:Pearson, Spearman, Kendall, 偏相关系数, 多分格polychoric,多系列polyserial PSK: 相关系数cor()...

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