condition mean min max ZT0-3 16.3915203325 15.633598195 17.14944247 ZT4-7 21.677498615 15.834507845 27.520489385 ZT8-11 37.2033298325 32.669007385 41.737652280000006 ZT12-15 29.61984463 25.30583482 33.93385444 ZT16-19 20.7820052675 20.76854969 20.795460845 ZT20-23 22.713112695 21.83260117 23.59362422