Table 3.

Power calculation table.

Power of the study (1-β)	Sample correlation (r)
	.20	.30	.40	.50	.60	.70	.80
0.90	259	113	62	38	25	17	12
0.80	194	85	47	29	19	13	10
0.70	153	67	37	23	16	11	8
0.60	122	54	30	19	13	10	7