condition mean min max ZT0-3 185.181567 185.181567 185.181567 ZT4-7 145.0187315 145.0187315 145.0187315 ZT8-11 151.52039050000002 151.52039050000002 151.52039050000002 ZT12-15 142.558475 142.558475 142.558475 ZT16-19 189.83794949999998 189.83794949999998 189.83794949999998 ZT20-23 171.3361445 171.3361445 171.3361445