condition mean min max ZT0-3 438.0 438.0 438.0 ZT4-7 627.7 627.7 627.7 ZT8-11 568.35 568.35 568.35 ZT12-15 663.6500000000001 663.6500000000001 663.6500000000001 ZT16-19 715.05 715.05 715.05 ZT20-23 514.9000000000001 514.9000000000001 514.9000000000001