condition mean min max ZT0-3 19.533061585 15.031158300000001 24.03496487 ZT4-7 30.318712710000003 28.149824195 32.487601225000006 ZT8-11 21.1934772475 18.45715981 23.929794685 ZT12-15 13.6667284625 13.214689459999999 14.118767465 ZT16-19 26.835404545 20.003538159999998 33.66727093 ZT20-23 76.3614109525 52.49576472 100.227057185