condition mean min max ZT0-3 13.746849999999998 13.746849999999998 13.746849999999998 ZT4-7 13.0839 13.0839 13.0839 ZT8-11 9.75353 9.75353 9.75353 ZT12-15 10.39036 10.39036 10.39036 ZT16-19 15.0264 15.0264 15.0264 ZT20-23 15.57225 15.57225 15.57225