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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x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);(4)t检验用英文小写t;(5)F检验用英文大写F;(6)卡方检验用希文小写χ2;(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(P值前应给出具体检验值,如t值、χ2值、q值等)。以上符号均用斜体。
According to GB / T 3358.1 ~ 3-1993 “statistical terms” of the relevant provisions of statistical symbols shall be printed in italics. Commonly used: (1) the arithmetic mean of the sample is written in lowercase x or mean in English (median is M or median in English); (2) the standard deviation is written in lowercase s or uppercase SD (in English); ) Standard misuse English lowercase sx or uppercase SE (limited to English literature); (4) t test in lowercase English t; (5) F test in uppercase F; (6) chi-square test with lowercase χ2; ( 7) the correlation coefficient in English lowercase r; (8) degrees of freedom in Greek lowercase ν or df (limited to English literature); (9) Probability in English capital P (P value should be given specific test values, such as t value , Χ2 value, q value, etc.). The above symbols are in italics.