condition mean min max ZT0-3 20.448475000000002 18.66235 22.2346 ZT4-7 12.5638 12.5638 12.5638 ZT8-11 25.9543 25.9543 25.9543 ZT12-15 0 0 0 ZT16-19 26.1445 26.1445 26.1445 ZT20-23 20.3674 20.3674 20.3674