condition mean min max ZT0-3 10.141265 10.141265 10.141265 ZT4-7 10.4981035 10.4981035 10.4981035 ZT8-11 10.283278 10.283278 10.283278 ZT12-15 11.458126 11.458126 11.458126 ZT16-19 9.463941 9.463941 9.463941 ZT20-23 8.911101 8.911101 8.911101