condition mean min max ZT0-3 0.7702483333333333 0.0 1.557925 ZT4-7 0.0 0.0 0.0 ZT8-11 0.757325 0.757325 0.757325 ZT12-15 0.0 0.0 0.0 ZT16-19 0.731475 0.731475 0.731475 ZT20-23 0.824815 0.824815 0.824815