condition mean min max ZT0-3 1.60187 1.60187 1.60187 ZT4-7 0.9573605000000001 0.9573605000000001 0.9573605000000001 ZT8-11 1.27976 1.27976 1.27976 ZT12-15 1.629225 1.629225 1.629225 ZT16-19 2.6123250000000002 2.6123250000000002 2.6123250000000002 ZT20-23 1.79598 1.79598 1.79598