condition mean min max ZT0-3 0.2563765 0.2563765 0.2563765 ZT4-7 0.3236725 0.3236725 0.3236725 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.2802695 0.2802695 0.2802695