condition mean min max ZT0-3 2746.805 2746.805 2746.805 ZT4-7 766.9955 766.9955 766.9955 ZT8-11 349.0715 349.0715 349.0715 ZT12-15 387.80499999999995 387.80499999999995 387.80499999999995 ZT16-19 1534.5149999999999 1534.5149999999999 1534.5149999999999 ZT20-23 2340.59 2340.59 2340.59