condition mean min max ZT0-3 0.9534105 0.9534105 0.9534105 ZT4-7 1.1531555 1.1531555 1.1531555 ZT8-11 0.43044000000000004 0.43044000000000004 0.43044000000000004 ZT12-15 0.571635 0.571635 0.571635 ZT16-19 1.00108 1.00108 1.00108 ZT20-23 0.7478389999999999 0.7478389999999999 0.7478389999999999