condition mean min max ZT0-3 37.734146 37.734146 37.734146 ZT4-7 28.103534500000002 28.103534500000002 28.103534500000002 ZT8-11 20.472872000000002 20.472872000000002 20.472872000000002 ZT12-15 22.796332 22.796332 22.796332 ZT16-19 15.5193295 15.5193295 15.5193295 ZT20-23 14.746441 14.746441 14.746441