condition mean min max ZT0-3 37.548249999999996 37.548249999999996 37.548249999999996 ZT4-7 27.468049999999998 27.468049999999998 27.468049999999998 ZT8-11 32.19005 32.19005 32.19005 ZT12-15 38.209450000000004 38.209450000000004 38.209450000000004 ZT16-19 46.97325 46.97325 46.97325 ZT20-23 47.30175 47.30175 47.30175