condition mean min max ZT0-3 24.968277635 16.50292465 33.43363062 ZT4-7 58.73516415500001 54.345051170000005 63.12527714 ZT8-11 81.06607685 77.43889393 84.69325977 ZT12-15 45.2293918 34.73412761 55.72465599 ZT16-19 32.62552757 30.07718602 35.173869120000006 ZT20-23 25.7336855075 25.063783555 26.40358746