condition mean min max ZT0-3 19.34045 16.650100000000002 22.0308 ZT4-7 2.665325 2.665325 2.665325 ZT8-11 2.60761 2.60761 2.60761 ZT12-15 0 0 0 ZT16-19 23.8169 23.8169 23.8169 ZT20-23 17.626350000000002 17.626350000000002 17.626350000000002