condition mean min max ZT0-3 153.232057 153.232057 153.232057 ZT4-7 163.17050999999998 163.17050999999998 163.17050999999998 ZT8-11 182.38590299999998 182.38590299999998 182.38590299999998 ZT12-15 213.14187700000002 213.14187700000002 213.14187700000002 ZT16-19 202.6472545 202.6472545 202.6472545 ZT20-23 175.9156215 175.9156215 175.9156215