condition mean min max ZT0-3 1584.240533 1584.240533 1584.240533 ZT4-7 1224.244708 1224.244708 1224.244708 ZT8-11 1664.7697285 1664.7697285 1664.7697285 ZT12-15 1714.2442190000002 1714.2442190000002 1714.2442190000002 ZT16-19 2178.006707 2178.006707 2178.006707 ZT20-23 2412.4009805 2412.4009805 2412.4009805