condition mean min max ZT0-3 0.866886 0.777313 0.9564590000000001 ZT4-7 1.7993700000000001 1.7993700000000001 1.7993700000000001 ZT8-11 2.146945 2.146945 2.146945 ZT12-15 0 0 0 ZT16-19 2.98694 2.98694 2.98694 ZT20-23 2.166005 2.166005 2.166005