condition mean min max ZT0-3 230.9665 230.9665 230.9665 ZT4-7 162.042 162.042 162.042 ZT8-11 139.961 139.961 139.961 ZT12-15 146.78500000000003 146.78500000000003 146.78500000000003 ZT16-19 229.3135 229.3135 229.3135 ZT20-23 256.6515 256.6515 256.6515