condition mean min max ZT0-3 12.5686 12.5686 12.5686 ZT4-7 10.83865 10.83865 10.83865 ZT8-11 8.420110000000001 8.420110000000001 8.420110000000001 ZT12-15 8.415945 8.415945 8.415945 ZT16-19 9.723980000000001 9.723980000000001 9.723980000000001 ZT20-23 11.67815 11.67815 11.67815