condition mean min max ZT0-3 16.34135 16.26175 16.420949999999998 ZT4-7 15.580300000000001 15.580300000000001 15.580300000000001 ZT8-11 11.9067 11.9067 11.9067 ZT12-15 0 0 0 ZT16-19 16.5669 16.5669 16.5669 ZT20-23 13.70215 13.70215 13.70215