condition mean min max ZT0-3 0.580103 0.4149305 0.7009415 ZT4-7 0.2744739 0.2744739 0.2744739 ZT8-11 0.334892 0.334892 0.334892 ZT12-15 1.08818375 1.081741 1.0946265 ZT16-19 0.637148 0.637148 0.637148 ZT20-23 0.6926025 0.6926025 0.6926025