Effect of Student, Family-Related Features on Academic Achievement

Table 2

Average Age by gender and school cycle.

		Female		Male		Total
		Average	SD^1	Average	SD	Average	SD
Middle school	1st grade; 2nd grade; 3rd grade; Total	12.86; 13.71; 15.15; 13.91	1.13; 0.97; 1.15; 1.43	13.02; 13.80; 15.19; 14.04	1.29; 0.98; 1.25; 1.51	12.94; 13.75; 15.17; 13.97	1.22; 0.97; 1.20; 1.47
High school	1st grade; 2nd grade; 3rd grade; Total	15.94; 16.93; 18.15; 16.80	0.78; 0.75; 1.14; 1.30	15.73; 16.73; 17.74; 16.66	0.74; 0.69; 0.92; 1.08	15.88; 16.82; 18.00; 16.74	0.77; 0.72; 1.08; 1.22
Total	374	14.96	1.97	14.78	1.83	14.87

¹SD : standard deviation.