condition mean min max ZT0-3 44.6 44.6 44.6 ZT4-7 62.5 62.5 62.5 ZT8-11 12.700000000000001 12.700000000000001 12.700000000000001 ZT12-15 46.2 46.2 46.2 ZT16-19 50.95 50.95 50.95 ZT20-23 61.650000000000006 61.650000000000006 61.650000000000006