Vertical jump | Experimental group (n = 1020) | χ2 | Control group (n = 1112) | χ2 | χ2 | |||
a1) | b2) | a3) | b4) | 1) 3) | 2) 4) | |||
Qualified | 456 | 513 | 6.387* | 500 | 514 | 0.355 | 0.014 | 3.532 |
Unqualified | 564 | 507 | 612 | 598 |