统计学符号应按 GB3358-82《统计学名词及符号》的有关规定书写,常用的有:(1)样本的算术平均数用英文小写 x(中位数仍用 M);(2)标准差用英文小写 s;(3)标准误用英文小写 s;(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 x~2;(7)相关系数用英文小写 r;(8)自由度用希文小写 v;(9)概率用英文大写 P(P 值前应给出具体检验值,如 t值、q 值等)。以上符号均用斜体。对 P 值小于或等于检验水准(一般为0.05)者,一律描述为“差异有统计学意义”。请在方 Statistical symbols should be GB3358-82 “statistical terms and symbols,” the relevant provisions of the writing, commonly used are: (1) the arithmetic mean of the sample in lowercase x (median still use M); (2) standard deviation (4) t test in lowercase English t; (5) F test in uppercase F; (6) chi-square test in lower case x ~ 2; ( 7) The correlation coefficient is in lowercase r in English; (8) The degree of freedom is in lower case v; (9) The probability is written in uppercase P in English (specific test values ​​such as t value and q value should be given before P value). The above symbols are in italics. P value is less than or equal to the test level (usually 0.05), all described as “significant difference”. Please party