condition mean min max ZT0-3 622.9000000000001 622.9000000000001 622.9000000000001 ZT4-7 690.6 690.6 690.6 ZT8-11 522.8 522.8 522.8 ZT12-15 560.0 560.0 560.0 ZT16-19 634.8499999999999 634.8499999999999 634.8499999999999 ZT20-23 553.05 553.05 553.05