condition mean min max ZT0-3 16.881069 16.881069 16.881069 ZT4-7 41.9549655 41.9549655 41.9549655 ZT8-11 37.911168 37.911168 37.911168 ZT12-15 44.979155500000005 44.979155500000005 44.979155500000005 ZT16-19 95.156815 95.156815 95.156815 ZT20-23 128.509935 128.509935 128.509935