condition mean min max ZT0-3 0.9513205 0.19917400000000002 1.61891 ZT4-7 0.8590679999999999 0.8590679999999999 0.8590679999999999 ZT8-11 0.7076385000000001 0.7076385000000001 0.7076385000000001 ZT12-15 0.79917925 0.782545 0.8158135 ZT16-19 1.13742 1.13742 1.13742 ZT20-23 1.12326 1.12326 1.12326