condition mean min max ZT0-3 599.509304 599.509304 599.509304 ZT4-7 482.2352055 482.2352055 482.2352055 ZT8-11 401.78346899999997 401.78346899999997 401.78346899999997 ZT12-15 523.1648594999999 523.1648594999999 523.1648594999999 ZT16-19 450.059118 450.059118 450.059118 ZT20-23 737.8079640000001 737.8079640000001 737.8079640000001