| 15-16 16-17 18-19 | 72% 27% 1% | |
| 99% 1% | ||
| 28% 2% 70% | ||
| 79% 10% 11% | ||
| 80% 20% 9% 15% | ||
| () | 49% 34% 17% | |
| =0.8* ≤0.01** p = 0.8 ≤ 0.05 = 0.9 ≤ 0.01 p = 0.9 ≤ 0.05 | 10 650 . 246 . 5 994 . 138 . |
* .
** .
-
. 3 . . , , . . , . , , . 20 21.
20
-
21
- (% )
χ 2 ≤ 0.05 (. . 22), ( ) .
22
