Class | The sample’s demographic data | ||
Student trainees’ number | Sex | average age ± ET | |
3rd year 1 | 13 | Male | 21 ± 1.8 |
3rd year 2 | 16 | Male | |
3rd year 3 | 15 | Female | |
3rd year 4 | 14 | Male | |
3rd year 5 | 16 | Male | |
3rd year 6 | 16 | Female | |
3rd year 7 | 11 | Male | |
3rd year 8 | 15 | Female |