condition mean min max ZT0-3 6.58508701775 2.495808903 10.6743651325 ZT4-7 24.57903538 19.717275270000002 29.44079549 ZT8-11 62.5782814475 48.57230251 76.584260385 ZT12-15 43.489123934999995 29.335559205 57.642688664999994 ZT16-19 30.37292742 28.03958642 32.70626842 ZT20-23 30.689509792499997 30.099342035 31.27967755