condition mean min max ZT0-3 10.70364 10.27853 11.12875 ZT4-7 3.0829050000000002 3.0829050000000002 3.0829050000000002 ZT8-11 4.763665 4.763665 4.763665 ZT12-15 0 0 0 ZT16-19 15.06815 15.06815 15.06815 ZT20-23 10.89915 10.89915 10.89915