condition mean min max ZT0-3 12.918966666666666 12.2057 13.31545 ZT4-7 10.148475000000001 10.148475000000001 10.148475000000001 ZT8-11 8.338 8.338 8.338 ZT12-15 13.1314 10.4844 15.7784 ZT16-19 9.91305 9.91305 9.91305 ZT20-23 17.04175 17.04175 17.04175