condition mean min max ZT0-3 13.9332 13.9332 13.9332 ZT4-7 16.809649999999998 16.809649999999998 16.809649999999998 ZT8-11 12.655149999999999 12.655149999999999 12.655149999999999 ZT12-15 13.1591 13.1591 13.1591 ZT16-19 16.096049999999998 16.096049999999998 16.096049999999998 ZT20-23 11.3206 11.3206 11.3206