condition mean min max ZT0-3 506.25 506.25 506.25 ZT4-7 376.6 376.6 376.6 ZT8-11 492.65 492.65 492.65 ZT12-15 598.6500000000001 598.6500000000001 598.6500000000001 ZT16-19 787.35 787.35 787.35 ZT20-23 714.5 714.5 714.5