condition mean min max ZT0-3 23.722099999999998 23.722099999999998 23.722099999999998 ZT4-7 23.0146 23.0146 23.0146 ZT8-11 21.5206 21.5206 21.5206 ZT12-15 17.3441 17.3441 17.3441 ZT16-19 20.54905 20.54905 20.54905 ZT20-23 19.406750000000002 19.406750000000002 19.406750000000002