The variance of the following distribution is
- 2
- 4
- 6
- 8
Solution
$\because \quad$ Variance $=\frac{\sum f \cdot x^2}{\sum f}-\left(\frac{\sum f \cdot x}{\sum f}\right)^2=20-16=4$
Asked in: AP EAMCET 2018 (22 Apr Shift 2)
$\because \quad$ Variance $=\frac{\sum f \cdot x^2}{\sum f}-\left(\frac{\sum f \cdot x}{\sum f}\right)^2=20-16=4$