condition mean min max ZT0-3 13.03754143775 11.798369815500001 14.27671306 ZT4-7 10.270807203 10.0310427775 10.510571628500001 ZT8-11 8.199165864000001 8.02939671 8.368935018 ZT12-15 17.73821632025 10.6987390005 24.777693640000003 ZT16-19 19.7196189425 19.18642155 20.252816335 ZT20-23 20.747145045 19.14363651 22.35065358