condition mean min max ZT0-3 1.514057197 1.4693274969999999 1.558786897 ZT4-7 72.91980065025001 35.1368687655 110.70273253500001 ZT8-11 430.5815007 337.60183705000003 523.56116435 ZT12-15 387.97401400250004 234.17184655499997 541.7761814500001 ZT16-19 25.41823527975 11.9860909195 38.85037964 ZT20-23 2.353168524 1.756542673 2.9497943749999997