condition mean min max ZT0-3 29.6775 23.70525 35.64975 ZT4-7 31.87475 31.87475 31.87475 ZT8-11 21.6256 21.6256 21.6256 ZT12-15 0 0 0 ZT16-19 23.30825 23.30825 23.30825 ZT20-23 18.3028 18.3028 18.3028