condition mean min max ZT0-3 358.294827 358.294827 358.294827 ZT4-7 607.9438685 607.9438685 607.9438685 ZT8-11 677.536831 677.536831 677.536831 ZT12-15 613.5742775 613.5742775 613.5742775 ZT16-19 579.997775 579.997775 579.997775 ZT20-23 485.62104450000004 485.62104450000004 485.62104450000004