科技类文章一般需要统计学处理与分析,在此对常用统计学变量的正确书写规范按GB3358-82《统计学名词及符号》的有关规定作一说明。书写时需特别注意这些字母是英文还是希文、是大写还是小写、字母顶端的标记及上下角标。常用统计变量如下:1)样本的算术平均数用英文Mean(中位数用Md);2)标准差用SD;3)标 Science and technology articles generally require statistical analysis and processing, in which the correct statistical variables commonly used norms written by GB3358-82 “statistical terms and symbols” for a description of the relevant provisions. Special attention should be paid when writing these letters are in English or Greek, uppercase or lowercase, the top of the letter mark and the upper and lower corners. Commonly used statistical variables are as follows: 1) the arithmetic mean of the sample in English Mean (median with Md); 2) standard deviation SD; 3) standard