condition mean min max ZT0-3 59.554141 59.554141 59.554141 ZT4-7 30.240026 30.240026 30.240026 ZT8-11 88.6595595 88.6595595 88.6595595 ZT12-15 77.0467965 77.0467965 77.0467965 ZT16-19 53.085124 53.085124 53.085124 ZT20-23 63.367306 63.367306 63.367306