| abscissa | 横坐标 |
| absence rate | 缺勤率 |
| absolute number | 绝对数 |
| absolute value | 绝对值 |
| accident error | 偶然误差 |
| accumulated frequency | 累积频数 |
| alternative hypothesis | 备择假设 |
| analysis of data | 分析资料 |
| analysis of variance(ANOVA) | 方差分析 |
| arith-log paper | 算术对数纸 |
| arithmetic mean | 算术均数 |
| assumed mean | 假定均数 |
| arithmetic weighted mean | 加权算术均数 |
| asymmetry coefficient | 偏度系数 |
| average | 平均数 |
| average deviation | 平均差 |
