condition mean min max ZT0-3 57.4531181925 30.276109885000004 84.6301265 ZT4-7 17.962904764999998 16.936792529999998 18.989017 ZT8-11 17.531988015000003 15.643718840000002 19.42025719 ZT12-15 14.4412983275 14.015726635 14.86687002 ZT16-19 23.399512715 21.87827399 24.92075144 ZT20-23 42.9543589425 34.69464236 51.214075525