condition mean min max ZT0-3 38.256725 37.52905 38.9844 ZT4-7 26.722 26.722 26.722 ZT8-11 78.7316 78.7316 78.7316 ZT12-15 0 0 0 ZT16-19 91.37899999999999 91.37899999999999 91.37899999999999 ZT20-23 68.35419999999999 68.35419999999999 68.35419999999999