每一次重大考试(如全区、全县统考)之后,不论是区县教育部门负责人,还是学校领导、任课教师都希望尽快知道考试情况如何?一般地总是希望尽快地知道算术平均数,因为它能较好地反映一个地区、一个部门,一个班的整体水平如何?但如果在每一个学生的成绩都全部收齐之后计算出整个区、县或学校的平均成绩的话,费时肯定太多。那么如何才能既迅速、又省力 After each major exam (such as the whole district and county examinations), whether it be the head of the education department or the leader of the school or the teachers in the school, all the teachers want to know the examination as soon as possible. Generally, they always hope to know the arithmetic average as soon as possible, Because it can better reflect the overall level of a region, a department, a class? But if each student's scores are all received after the average calculation of the district, county or school, time-consuming certainly too much . So how quickly and effortlessly?