condition mean min max ZT0-3 32.992149999999995 32.992149999999995 32.992149999999995 ZT4-7 35.6869 35.6869 35.6869 ZT8-11 10.310925 10.310925 10.310925 ZT12-15 3.435985 3.435985 3.435985 ZT16-19 8.24147 8.24147 8.24147 ZT20-23 22.7393 22.7393 22.7393