condition mean min max ZT0-3 49.5157 49.5157 49.5157 ZT4-7 63.41330000000001 63.41330000000001 63.41330000000001 ZT8-11 56.511449999999996 56.511449999999996 56.511449999999996 ZT12-15 41.8674 41.8674 41.8674 ZT16-19 32.6887 32.6887 32.6887 ZT20-23 34.1274 34.1274 34.1274