Table 1.

Type 1 error (α), Type 2 error (β), and statistical power (1 − β)

	${Ĥ}_0$	${Ĥ}_1$
H 0	$Pr\left({Ĥ}_0\mid H_0\right)=1-\alpha$	$Pr\left({Ĥ}_1\mid H_0\right)=\alpha$
H 1	$Pr\left({Ĥ}_0\mid H_1\right)=\beta$	$Pr\left({Ĥ}_1\mid H_1\right)=1-\beta$

H₀: Null hypothesis is true; ${Ĥ}_0$: Null hypothesis is accepted

H₁: Alternative hypothesis is true; ${Ĥ}_1$: Alternative hypothesis is accepted