利用统计软件分析重修率与低收入家庭学生的百分比之间的关系

Using Statistical Software to Analyze the Relationship between the Rehabilitation Rate and the Percentage of Low-Income Students

2006年7月23日,休斯敦Chronicle发表了题为Reading: First-Grade Standard Too Tough for Many的文章,称“部分人认为更多学生(横跨得克萨斯州)都不必重修一年级,而专家认为应该让贫困地区的学生重修一年级。”该文章介绍的数据为2004~2005年和1994~1995年每个在得克萨斯州61个县的学生:Y = 一年级学生重修率,X = 低收入家庭学生百分比。这些数据来自于书中网站上的文件HoustonChronicle.csv。用R语言采用协方差分析来决定:1) 一年级学生重修率与低收入家庭学生百分比之间的关系;2) 1994~1995年和2004~2005年一年级学生重修率的差异;3) 1994~1995年和2004~2005年一年级学生重修率与低收入家庭学生百分比之间关系的差异。

On July 23, 2006, the Houston Chronicle published an article entitled “Reading: First-Grade Stand-ard Too Tough for Many”. The article claimed in part that “Some people think that more students (across Texas) do not have to rehabilitate the first grade, and experts believe that students in poor areas should be rebuilt in the first grade.” The article presents data for each of 61 Texas counties on Y = Percentage of students repeating first grade x = Percentage of low-income students for both 2004~2005 and 1994~1995. The data can be found on the book web site in the file HoustonChronicle.csv. Analysis of covariance is used to decide whether: 1) an increase in the per-centage of low income students is associated with an increase in the percentage of students re-peating first grade;2) there has been an increase in the percentage of students repeating first grade between 1994~1995 and 2004~2005;3) an association between the percentage of students repeating first grade and the percentage of low-income students differs between 1994~1995 and 2004~2005.