condition mean min max ZT0-3 21.1489 20.10255 22.2576 ZT4-7 14.93075 14.93075 14.93075 ZT8-11 25.93905 25.93905 25.93905 ZT12-15 30.177175 25.86805 34.4863 ZT16-19 23.7408 23.7408 23.7408 ZT20-23 25.54495 25.54495 25.54495