condition mean min max ZT0-3 57.49205 57.49205 57.49205 ZT4-7 33.313649999999996 33.313649999999996 33.313649999999996 ZT8-11 34.35665 34.35665 34.35665 ZT12-15 61.8655 61.8655 61.8655 ZT16-19 76.86009999999999 76.86009999999999 76.86009999999999 ZT20-23 73.6537 73.6537 73.6537