Table 1.

Power analysis

t tests—Means: Difference from constant (one sample case)
Analysis:	Post hoc: Compute achieved power
Input:	Tail(s) = Two
	Effect size d = 0.5
	α err prob = 0.05
	Total sample size = 80
Output:	Noncentrality parameter δ = 4.4721
	Critical t = 1.9904
	Df = 79
	Power (1-β err prob) = 0.9930