# Math Help - one-parameter weibull distribution

1. ## one-parameter weibull distribution

i need to find the E[x] and E[x^2] for the one-dimential weibull distribution.
the pdf is given by:
2ax*e^(-ax^2), where a is the parameter

i can only integrate it by introducing the erf function. and i cant find anything online about thie one-parameter case

thanks

2. Originally Posted by lauren2988
i need to find the E[x] and E[x^2] for the one-dimential weibull distribution.
the pdf is given by:
2ax*e^(-ax^2), where a is the parameter

i can only integrate it by introducing the erf function. and i cant find anything online about thie one-parameter case

thanks
Read the attachment for the general case. Make the necessary substitutions for your particular integral.