condition mean min max ZT0-3 24.34055 24.34055 24.34055 ZT4-7 19.245350000000002 19.245350000000002 19.245350000000002 ZT8-11 17.507350000000002 17.507350000000002 17.507350000000002 ZT12-15 19.8146 19.8146 19.8146 ZT16-19 22.564700000000002 22.564700000000002 22.564700000000002 ZT20-23 23.26925 23.26925 23.26925