condition mean min max ZT0-3 2708.416253 2708.416253 2708.416253 ZT4-7 1109.097623 1109.097623 1109.097623 ZT8-11 924.446403 924.446403 924.446403 ZT12-15 1495.8665855 1495.8665855 1495.8665855 ZT16-19 2518.822427 2518.822427 2518.822427 ZT20-23 2461.9119555 2461.9119555 2461.9119555