For given data $N=60, \sum X^2=18000$ and $\sum X=960$, then variance of data is

Question

Aicharya · Accepted Answer

Variance $=\frac{\sum x^2}{N}-\left(\frac{\sum x}{N}\right)^2=\frac{18000}{60}-\left(\frac{960}{60}\right)^2=300-256=44$

Solution