condition mean min max ZT0-3 5.6943325 5.063995 6.32467 ZT4-7 12.4208 12.4208 12.4208 ZT8-11 14.4771 14.4771 14.4771 ZT12-15 0 0 0 ZT16-19 12.0079 12.0079 12.0079 ZT20-23 11.15505 11.15505 11.15505