基于R语言的成绩分析方法

The method of examination scores analysis based on R language

考试成绩反映出学生一定的能力,对学习过程和课程教学给出有价值的意义反馈,并且作为评估试题质量的数据依据对制定更加完善的考试方案具有参考价值。因此,提出基于R语言的成绩分析方法,使用R的基本统计量计算和显示数据分布的绘图函数,实现成绩统计性分析和试题质量评估;使用R的arules添加包执行Apriori算法实现关联规则挖掘,发现成绩中隐含的有价值信息。以C语言程序设计课程期末考试成绩作为数据样本,分析了学生整体成绩水平和差异、试题的难度、信度、区分度和效度以及影响学生成绩的主要因素。

Examination results should reveal students＇ real academic level and give valid feedback to students and teachers,for helping them improve learning abilities and teaching quality. The quality analysis of examination paper can offer meaningful reference for making more consummated exam plan. Based on the above considerations,the paper puts forward a method of examination results analysis,using R basic statistics and plotting functions to perform statistical analysis,and using Apriori algorithm from arulets package to excavate association rules for searching valuable information which is hidden in papers. Taking final exam scores of ＂ C language programming＂ course as example,the paper gives analysis results of students＇ overall level and differences,makes a quantitative evaluation on difficulty、credibility、discrimination and validity,and finds the key factors influencing student achievement.