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1.统计学符号按照GB/T 3358.1~3—1993《统计学术语》的有关规定,统计学符号一律采用斜体排印。常用:①样本的算术平均数用英文小写M或mean(中位数英文叙述中用M或median);②标准差用英文小写s或大写SD(限英文文献中);③标准误用英文小写sx或大写SE(限英文文献中);④t检验用英文小写t;⑤F检验用英文大写F;⑥卡方检验用希文小写χ~2;⑦相关系数用英文小写r;⑧自由度用希文小写ν或df(限英文文献中);⑨概率用英文大写P。
1. Statistical symbols According to GB / T 3358.1 ~ 3-1993 “statistical terms” of the relevant provisions of statistical symbols shall be used in italics. Commonly used: (1) The arithmetic mean of the sample is written in English lowercase M or mean (M or median in the median English description); (2) The standard deviation is written in lowercase s or uppercase SD (limited to English); sx or uppercase SE (English literature only); ④ t test in lowercase English t; ⑤ F test in uppercase F; ⑥ chi-square test in lowercase χ ~ 2; ⑦ correlation coefficient in lowercase English r; ⑧ degree of freedom Lowercase ν or df (limited to English literature); ⑨ probability capitalized in English P.