condition mean min max ZT0-3 2918.2 2918.2 2918.2 ZT4-7 3515.5 3515.5 3515.5 ZT8-11 3997.9500000000003 3997.9500000000003 3997.9500000000003 ZT12-15 2830.8 2830.8 2830.8 ZT16-19 2321.5 2321.5 2321.5 ZT20-23 2364.95 2364.95 2364.95