condition mean min max ZT0-3 38.96575 38.96575 38.96575 ZT4-7 35.417 35.417 35.417 ZT8-11 19.809849999999997 19.809849999999997 19.809849999999997 ZT12-15 51.6794 51.6794 51.6794 ZT16-19 31.21595 31.21595 31.21595 ZT20-23 45.77565 45.77565 45.77565