condition mean min max ZT0-3 10.802532500000002 9.476555000000001 12.12851 ZT4-7 12.18505 12.18505 12.18505 ZT8-11 4.28636 4.28636 4.28636 ZT12-15 0 0 0 ZT16-19 1.66798 1.66798 1.66798 ZT20-23 7.8572049999999996 7.8572049999999996 7.8572049999999996