condition mean min max ZT0-3 388.685119 388.685119 388.685119 ZT4-7 518.30972 518.30972 518.30972 ZT8-11 459.67887299999995 459.67887299999995 459.67887299999995 ZT12-15 274.773386 274.773386 274.773386 ZT16-19 482.77752350000003 482.77752350000003 482.77752350000003 ZT20-23 655.2151425 655.2151425 655.2151425