Is beta risk dependent on the alpha risk? If alpha risk is bigger, is beta risk then smaller? Or is it only dependent on size of the sample and variability.. I'm getting really confused:/

@aksun Decreasing alpha (Type I error) will increase beta (Type II error). However, you can counteract that by increasing sample size, which will decrease beta.

If the Null hypothesis is false, then changing alpha will affect the type II error risk.
If the Null hypothesis is true, then there is no type II error risk.