condition mean min max ZT0-3 45.03397 45.03397 45.03397 ZT4-7 28.042394 28.042394 28.042394 ZT8-11 18.366672 18.366672 18.366672 ZT12-15 30.393893 30.393893 30.393893 ZT16-19 35.1100895 35.1100895 35.1100895 ZT20-23 85.661828 85.661828 85.661828