condition mean min max ZT0-3 9.4306775 9.207239999999999 9.654115000000001 ZT4-7 9.626529999999999 9.626529999999999 9.626529999999999 ZT8-11 10.038425 10.038425 10.038425 ZT12-15 0 0 0 ZT16-19 9.30823 9.30823 9.30823 ZT20-23 12.5816 12.5816 12.5816