Table 1.

Type-I error percentage as a function of ICC value and of the number of level-1 units (rows) and the number of level-2 units (columns).

Level-1 units	ICC	Level-2 units
		6	10	12	20	30	50	100
10	0.01	3.88	5.14	5.92	5.36	5.82	5.50	6.80
	0.2	30.28	27.64	20.00	25.62	26.02	24.62	23.39
	0.3	36.90	34.80	34.38	33.82	31.42	31.80	31.94
20	0.01	5.20	6.64	7.56	7.66	7.10	7.24	7.04
	0.2	43.88	40.42	40.90	38.78	36.66	38.36	38.28
	0.3	52.54	48.76	47.08	47.04	46.50	46.02	44.66
50	0.01	10.22	10.88	11.20	11.54	10.46	10.78	10.94
	0.2	62.26	60.02	57.84	57.48	55.86	55.80	55.70
	0.3	68.84	65.64	64.92	63.36	63.10	62.82	61.86
100	0.01	19.70	19.18	16.60	16.56	17.12	16.40	16.84
	0.2	72.40	68.34	69.32	68.10	67.32	68.08	67.02
	0.3	76.62	74.44	74.38	73.52	73.08	73.32	73.16

Actual ICC values are those displayed ± 0.001.