Table 1. Data of treatment groups, treatment effect (Effect), and age (Age).

Group														Mean	SD
Experimental group
	Effect	56	55	63	52	58	65	64	61	69	73	62	70	62.33	6.39
	Age	21	28	33	33	38	43	48	53	53	58	63	67	44.83	14.52
Control group
	Effect	28	25	71	62	50	46	34	59	36	71	62	71	51.25	17.19
	Age	19	23	67	56	45	37	27	47	29	59	51	63	43.58	16.36