condition mean min max ZT0-3 47.478350000000006 47.478350000000006 47.478350000000006 ZT4-7 30.51135 30.51135 30.51135 ZT8-11 27.87025 27.87025 27.87025 ZT12-15 21.5412 21.5412 21.5412 ZT16-19 35.9687 35.9687 35.9687 ZT20-23 41.5607 41.5607 41.5607