condition mean min max ZT0-3 9.106042500000001 8.456574999999999 9.755510000000001 ZT4-7 4.31017 4.31017 4.31017 ZT8-11 1.161504 1.161504 1.161504 ZT12-15 0 0 0 ZT16-19 1.050718 1.050718 1.050718 ZT20-23 3.26366 3.26366 3.26366