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Sample distribution.
| General high school students | Vocational high school students | |||||
|---|---|---|---|---|---|---|
| Grade level | 10th | 11th | 12th | 10th | 11th | 12th |
| Sample size | 612 | 513 | 402 | 428 | 347 | 75 |
| Number of girls | 314 | 271 | 209 | 250 | 205 | 37 |
| Mean age (SD) | 15.54 (0.6) | 16.43 (0.73) | 17.58 (0.59) | 15.48 (2.54) | 16.65 (5.11) | 17.77 (1.8) |
| Average SES (SD) | 3.16 (1.04) | 3.14 (1.12) | 3.22 (1.11) | 2.55 (1.25) | 2.58 (1.27) | 2.99 (1.24) |
SES, socioeconomic status. In this study, SES was operationalized as the number of books in households.
