condition mean min max ZT0-3 16.681849999999997 16.681849999999997 16.681849999999997 ZT4-7 14.484300000000001 14.484300000000001 14.484300000000001 ZT8-11 16.350099999999998 16.350099999999998 16.350099999999998 ZT12-15 16.4087 16.4087 16.4087 ZT16-19 17.67455 17.67455 17.67455 ZT20-23 19.0169 19.0169 19.0169