[tex]\sum ^n_{i\mathop=1}\frac{\text{xiP(x)}}{N}=\frac{0\cdot0.62+1\cdot0.24+2\cdot0.07+3\cdot0.05+4\cdot0.02}{0.62+0.24+0.07+0.05+0.02}=\frac{0.61}{1}=0.6[/tex]
[tex]s=\sqrt[]{\frac{(x-\mu)^2p(x)}{n}}[/tex]
[tex]\begin{gathered} \sum ^n_{i\mathop=1}(x-\mu)^2p(x)=(0-0.61)^20.62+(1-0.61)^20.24+(2-0.61)^20.07+.. \\ \text{ (3-0.61)}^20.05+(4-0.61)^20.02=0.9179 \\ \end{gathered}[/tex][tex]s=\sqrt[]{\frac{0.9179}{1}}=0.958\approx0.96[/tex]
