condition mean min max ZT0-3 412.213194 412.213194 412.213194 ZT4-7 203.4084675 203.4084675 203.4084675 ZT8-11 134.5020115 134.5020115 134.5020115 ZT12-15 146.5979625 146.5979625 146.5979625 ZT16-19 238.463982 238.463982 238.463982 ZT20-23 371.76684950000003 371.76684950000003 371.76684950000003