condition mean min max ZT0-3 1602.089585 1602.089585 1602.089585 ZT4-7 1737.468662 1737.468662 1737.468662 ZT8-11 1175.4579454999998 1175.4579454999998 1175.4579454999998 ZT12-15 781.5154339999999 781.5154339999999 781.5154339999999 ZT16-19 1031.414902 1031.414902 1031.414902 ZT20-23 1063.6057515 1063.6057515 1063.6057515