condition mean min max ZT0-3 22.664191 22.664191 22.664191 ZT4-7 51.710535500000006 51.710535500000006 51.710535500000006 ZT8-11 163.3500745 163.3500745 163.3500745 ZT12-15 119.874114 119.874114 119.874114 ZT16-19 155.746185 155.746185 155.746185 ZT20-23 175.2160945 175.2160945 175.2160945