condition mean min max ZT0-3 57.0 57.0 57.0 ZT4-7 70.7 70.7 70.7 ZT8-11 58.05 58.05 58.05 ZT12-15 104.75 104.75 104.75 ZT16-19 42.300000000000004 42.300000000000004 42.300000000000004 ZT20-23 67.6 67.6 67.6