condition mean min max ZT0-3 1820.52236 1820.52236 1820.52236 ZT4-7 3072.4101055 3072.4101055 3072.4101055 ZT8-11 3719.70058 3719.70058 3719.70058 ZT12-15 3155.8771189999998 3155.8771189999998 3155.8771189999998 ZT16-19 2079.966891 2079.966891 2079.966891 ZT20-23 1258.898827 1258.898827 1258.898827