Template:Aw mean

The Mean or MTTF
The mean,  $$\overline{T},$$  of the 2-parameter Weibull  $$pdf$$  is given by:
 * $$\overline{T}=\eta \cdot \Gamma \left( \frac{1}{\beta }+1 \right)$$

where $$\Gamma \left( \tfrac{1}{\beta }+1 \right)$$  is the gamma function evaluated at the value of  $$\left( \tfrac{1}{\beta }+1 \right)$$.