condition mean min max ZT0-3 11.524000000000001 11.524000000000001 11.524000000000001 ZT4-7 9.85215 9.85215 9.85215 ZT8-11 14.2224 14.2224 14.2224 ZT12-15 17.2153 17.2153 17.2153 ZT16-19 16.62775 16.62775 16.62775 ZT20-23 13.005400000000002 13.005400000000002 13.005400000000002