condition mean min max ZT0-3 57.595466 57.595466 57.595466 ZT4-7 81.0491665 81.0491665 81.0491665 ZT8-11 90.60454999999999 90.60454999999999 90.60454999999999 ZT12-15 92.496769 92.496769 92.496769 ZT16-19 95.27569 95.27569 95.27569 ZT20-23 91.8746535 91.8746535 91.8746535