condition mean min max ZT0-3 2857.35 2857.35 2857.35 ZT4-7 3649.2 3649.2 3649.2 ZT8-11 3612.8500000000004 3612.8500000000004 3612.8500000000004 ZT12-15 2705.3500000000004 2705.3500000000004 2705.3500000000004 ZT16-19 2134.7 2134.7 2134.7 ZT20-23 2122.15 2122.15 2122.15