condition mean min max ZT0-3 35.47538 35.47538 35.47538 ZT4-7 36.032408000000004 36.032408000000004 36.032408000000004 ZT8-11 44.494491499999995 44.494491499999995 44.494491499999995 ZT12-15 35.283767 35.283767 35.283767 ZT16-19 60.933661 60.933661 60.933661 ZT20-23 49.3863025 49.3863025 49.3863025