condition mean min max ZT0-3 74.177055 74.177055 74.177055 ZT4-7 59.7416635 59.7416635 59.7416635 ZT8-11 42.957009 42.957009 42.957009 ZT12-15 19.580156000000002 19.580156000000002 19.580156000000002 ZT16-19 44.038208499999996 44.038208499999996 44.038208499999996 ZT20-23 90.0606965 90.0606965 90.0606965