condition mean min max ZT0-3 0.12493516666666667 0.0 0.3748055 ZT4-7 0.0 0.0 0.0 ZT8-11 1.628165 1.628165 1.628165 ZT12-15 3.6887874999999997 3.5575799999999997 3.8199949999999996 ZT16-19 3.21722 3.21722 3.21722 ZT20-23 0.0 0.0 0.0