The symbol for the probability of a Type II error is <math>\beta</math> (beta). The power of a statistical test is defined as <math>1 - \beta</math>.
See also Type I error.
... at an average density of 173.1/km² (447.3/mi²). The racial makeup of the town is 89.99% White, 4.23% African American, 0.97% Native American, 0.97% Asian, ...