3.10 统计学符号:按 GB 3358-1982《统计学名词及符号》的有关规定书写。常用如下:①样本的算术平均数用英文小写 x-;中位数用 M;②标准差用英文小写 s,标准误用英文小写 sx-;③ t 检验用英文小写 t,F检验用英文大写 F ;④卡方检验用希文小写 χ2;⑤相关系数用英文小写 r ;⑥自由度用希文小写 υ ;⑦概率用英文大写 P 。
[2] MIYASAKA Y, BARNES M E, GERSH B J, et al.Secular trends in incidence of atrial fibrillation in Olmsted County,Minnesota,1980 to 2000, and implications on the projections for future prevalence[J]. Circulation, 2006,114:119-125.