condition mean min max ZT0-3 3604.2 3604.2 3604.2 ZT4-7 5135.9 5135.9 5135.9 ZT8-11 4235.8 4235.8 4235.8 ZT12-15 2860.3999999999996 2860.3999999999996 2860.3999999999996 ZT16-19 1615.6 1615.6 1615.6 ZT20-23 2311.4 2311.4 2311.4