condition mean min max ZT0-3 0.2891325 0.2891325 0.2891325 ZT4-7 0.3143445 0.3143445 0.3143445 ZT8-11 0.256039 0.256039 0.256039 ZT12-15 0.308593 0.308593 0.308593 ZT16-19 0.42918049999999996 0.42918049999999996 0.42918049999999996 ZT20-23 0.2510575 0.2510575 0.2510575