Statistics

<tex>f{(x)} = {\sum \lambda \cdot \bar{y} \over \sum \lambda^{ \over 2 n} }</tex>

$f(x,\mu ,\sigma )={\frac {1}{\sigma {\sqrt {2\pi }}}}e^{-{\frac {(x-\mu )^{2}}{2\sigma ^{2}}}}$