condition mean min max ZT0-3 0.2624415 0.2624415 0.2624415 ZT4-7 0.24454499999999998 0.24454499999999998 0.24454499999999998 ZT8-11 0.6361325 0.6361325 0.6361325 ZT12-15 1.0549695 1.0549695 1.0549695 ZT16-19 0.6591825 0.6591825 0.6591825 ZT20-23 0.6448780000000001 0.6448780000000001 0.6448780000000001