condition mean min max ZT0-3 11426.0 11426.0 11426.0 ZT4-7 13281.9 13281.9 13281.9 ZT8-11 13415.3 13415.3 13415.3 ZT12-15 14657.1 14657.1 14657.1 ZT16-19 15653.85 15653.85 15653.85 ZT20-23 12810.8 12810.8 12810.8