condition mean min max ZT0-3 567.6500000000001 567.6500000000001 567.6500000000001 ZT4-7 264.8 264.8 264.8 ZT8-11 422.15 422.15 422.15 ZT12-15 415.4 415.4 415.4 ZT16-19 627.55 627.55 627.55 ZT20-23 568.45 568.45 568.45