condition mean min max ZT0-3 0.0393642 0.0393642 0.0393642 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0101447 0.0101447 0.0101447 ZT12-15 0.0576488 0.0576488 0.0576488 ZT16-19 0.01082935 0.01082935 0.01082935 ZT20-23 0.04322385 0.04322385 0.04322385