由于统计符号往往都是参数与统计量成对出现,因此将这些相对应的符号列表如下所示:
Since statistical symbols are often parameters that appear in pairs with statistics, a list of these corresponding symbols is shown below:
| Parameters (overall) | Statistics (sample) | |
|---|---|---|
| Group size |  |  | 
| Mean |  |  | 
| Standard deviation |  |  | 
| Variance |  |  | 
| Correlation coefficient |  |  | 
Many calculations in statistics require the addition of a series of fractions, so the Greek letter  is used to represent the sum of a series of fractions. For example, 
 represents the sum of all values of the variable 
.