condition mean min max ZT0-3 1.08137 1.08137 1.08137 ZT4-7 0.5271684999999999 0.5271684999999999 0.5271684999999999 ZT8-11 1.397345 1.397345 1.397345 ZT12-15 0.0 0.0 0.0 ZT16-19 0.23050900000000002 0.23050900000000002 0.23050900000000002 ZT20-23 1.1951085 1.1951085 1.1951085