condition mean min max ZT0-3 722.7483333333333 689.5074999999999 764.7045 ZT4-7 772.973 772.973 772.973 ZT8-11 787.2025 787.2025 787.2025 ZT12-15 710.5185 673.4645 747.5725 ZT16-19 863.8985 863.8985 863.8985 ZT20-23 696.8125 696.8125 696.8125