Normal distribution

ATTENTION - instead of a decimal comma should be used decimal DOT !

**Formulas**
$X\sim No(\mu, \sigma^{2})$	$P(x_{1}\leq X\leq x_{2})=\int_{x_{1}}^{x_{2}}\frac{1}{\sqrt{2\pi }.\sigma }.e^{-\frac{(x-\mu )^{2}}{2\sigma ^{2}}}$
$E(X)=\mu }$	$D(X)=\sigma^{2} }$
$\gamma _{1}=0$	$\gamma _{2}=0$