condition mean min max ZT0-3 119.082862 119.082862 119.082862 ZT4-7 107.4089205 107.4089205 107.4089205 ZT8-11 106.2676345 106.2676345 106.2676345 ZT12-15 90.65857249999999 90.65857249999999 90.65857249999999 ZT16-19 80.929288 80.929288 80.929288 ZT20-23 78.5340615 78.5340615 78.5340615