condition mean min max ZT0-3 0.8728278333333332 0.742738 0.9636374999999999 ZT4-7 0.3885015 0.3885015 0.3885015 ZT8-11 0.771117 0.771117 0.771117 ZT12-15 1.1753135 1.033337 1.3172899999999998 ZT16-19 0.9998705000000001 0.9998705000000001 0.9998705000000001 ZT20-23 1.025723 1.025723 1.025723