condition mean min max ZT0-3 22.8434 11.61175 32.63225 ZT4-7 33.99465 33.99465 33.99465 ZT8-11 65.8652 65.8652 65.8652 ZT12-15 40.888225 40.209999999999994 41.56645 ZT16-19 46.63955 46.63955 46.63955 ZT20-23 34.7973 34.7973 34.7973