condition mean min max ZT0-3 0.24152549999999998 0.23075049999999997 0.2523005 ZT4-7 0.325127 0.325127 0.325127 ZT8-11 0.27837 0.27837 0.27837 ZT12-15 0 0 0 ZT16-19 0.4535555 0.4535555 0.4535555 ZT20-23 0.2963755 0.2963755 0.2963755