condition mean min max ZT0-3 23.9099 23.385849999999998 24.43395 ZT4-7 25.138550000000002 25.138550000000002 25.138550000000002 ZT8-11 18.728450000000002 18.728450000000002 18.728450000000002 ZT12-15 0 0 0 ZT16-19 17.467100000000002 17.467100000000002 17.467100000000002 ZT20-23 29.87755 29.87755 29.87755