condition mean min max ZT0-3 1.1457475000000001 1.1193650000000002 1.1721300000000001 ZT4-7 1.39397 1.39397 1.39397 ZT8-11 1.284945 1.284945 1.284945 ZT12-15 0 0 0 ZT16-19 1.36843 1.36843 1.36843 ZT20-23 1.33928 1.33928 1.33928