condition mean min max ZT0-3 14.30915 14.30915 14.30915 ZT4-7 13.6186965 13.6186965 13.6186965 ZT8-11 13.2548615 13.2548615 13.2548615 ZT12-15 29.880448 29.880448 29.880448 ZT16-19 13.877234999999999 13.877234999999999 13.877234999999999 ZT20-23 33.868446500000005 33.868446500000005 33.868446500000005