condition mean min max ZT0-3 122.693595 122.693595 122.693595 ZT4-7 118.374894 118.374894 118.374894 ZT8-11 114.9150105 114.9150105 114.9150105 ZT12-15 150.1694645 150.1694645 150.1694645 ZT16-19 120.5661315 120.5661315 120.5661315 ZT20-23 121.7310965 121.7310965 121.7310965