TABLE 7.

Receptive language Mullen Scales of Early Learning raw scores, standard deviations, confidence intervals and the range of scores for each age group.

Age (in months)	n	M	SD	SE	95% CI for M		Minimum	Maximum
					Lower bound	Upper bound
21–26	22	19.77	4.49	0.96	17.78	21.76	12.00	27.00
27–32	25	24.64*	5.05	1.01	22.56	26.72	15.00	33.00
33–38	23	28.22*	2.75	0.57	27.03	29.40	23.00	33.00
39–44	21	31.76	5.22	1.14	29.38	34.14	23.00	44.00
45–50	25	37.36*	3.88	0.78	35.76	38.96	28.00	43.00
51–56	27	38.63	4.29	0.83	36.93	40.33	30.00	45.00
57–62	29	42.21*	3.51	0.65	40.87	43.54	33.00	46.00
63–68	26	42.70	2.24	0.44	41.79	43.60	35.00	46.00
Total	198	33.73	8.82	0.63	32.49	34.96	12.00	46.00

^*, Mean is significantly different from mean of previous age group, p < .05.

n, number; M, mean; CI, confidence interval; SD, standard deviation; SE, standard error.