condition mean min max ZT0-3 63.9146 57.9439 69.8853 ZT4-7 28.913899999999998 28.913899999999998 28.913899999999998 ZT8-11 18.18175 18.18175 18.18175 ZT12-15 0 0 0 ZT16-19 31.4831 31.4831 31.4831 ZT20-23 33.49495 33.49495 33.49495