condition mean min max ZT0-3 47.050406 47.050406 47.050406 ZT4-7 65.1490915 65.1490915 65.1490915 ZT8-11 65.12796800000001 65.12796800000001 65.12796800000001 ZT12-15 65.642779 65.642779 65.642779 ZT16-19 61.1200925 61.1200925 61.1200925 ZT20-23 57.7934445 57.7934445 57.7934445