condition mean min max ZT0-3 51.91695 51.91695 51.91695 ZT4-7 63.199999999999996 63.199999999999996 63.199999999999996 ZT8-11 47.94115 47.94115 47.94115 ZT12-15 40.4708 40.4708 40.4708 ZT16-19 53.2534 53.2534 53.2534 ZT20-23 46.24865 46.24865 46.24865