condition mean min max ZT0-3 75.71615 71.5557 79.8766 ZT4-7 58.971399999999996 58.971399999999996 58.971399999999996 ZT8-11 72.9745 72.9745 72.9745 ZT12-15 0 0 0 ZT16-19 107.29405 107.29405 107.29405 ZT20-23 92.3708 92.3708 92.3708