合并标准差计算器
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Calculate
Example values are ready
Review the inputs, then select Calculate.Calculation formula
计算结果 = sqrt(((n1-1)*s1**2+(n2-1)*s2**2)/(n1+n2-2))
- n1
- 样本量 1
- s1
- 样本标准差 1
- n2
- 样本量 2
- s2
- 样本标准差 2
Enter values to see results and the formula.
Example values are ready
Review the inputs, then select Calculate.计算结果 = sqrt(((n1-1)*s1**2+(n2-1)*s2**2)/(n1+n2-2))