condition mean min max ZT0-3 45.841332 45.841332 45.841332 ZT4-7 108.33392950000001 108.33392950000001 108.33392950000001 ZT8-11 242.696826 242.696826 242.696826 ZT12-15 204.6297485 204.6297485 204.6297485 ZT16-19 217.72197699999998 217.72197699999998 217.72197699999998 ZT20-23 82.1640055 82.1640055 82.1640055