condition mean min max ZT0-3 15.57589962625 9.997994382500002 21.15380487 ZT4-7 0.08639388825 0.0 0.1727877765 ZT8-11 6.919562934 0.6735060175 13.1656198505 ZT12-15 26.6780334475 20.863109255 32.49295764 ZT16-19 43.103048685000005 39.869875910000005 46.33622146 ZT20-23 33.77210842 32.451566185000004 35.092650655