Research Article
Effect of Student, Family-Related Features on Academic Achievement
Table 2
Average Age by gender and school cycle.
| | Female | Male | Total | Average | SD1 | 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 | |
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1SD : standard deviation.
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