condition mean min max ZT0-3 22.643813 22.643813 22.643813 ZT4-7 18.061625 18.061625 18.061625 ZT8-11 18.472078 18.472078 18.472078 ZT12-15 19.1394265 19.1394265 19.1394265 ZT16-19 22.0112065 22.0112065 22.0112065 ZT20-23 21.793212500000003 21.793212500000003 21.793212500000003