教学评估系统的数据过滤算法的设计与实现

Design and Implementation of Data Filtering Arithmetic in the Online Teaching Evaluation System

通过方差和标准差的计算,分析评估分数,认为以下三种评分是可以剔除的:一是n个评分项的方差为0;二是m位教师的原始得分的方差为0;三是某位教师的某个得分与其任课班的总体数学期望的绝对差大于2倍该班的所有任课教师原始得分的总体标准差。

There are three types data that can be rejected by counting the variance and the standard deviation by analyzing the evaluated determine work points, The first, the variance of n items＇ points is equal to 0,the second, the variance ofm teachers＇ determine work points is equal to 0,the last, the absolute value which a certain teacher＇ s point minus the mathematical expectation of all points of the class which being taught by the teacher is morn than twice all points＇ total standard deviation.