condition mean min max ZT0-3 70.35925 35.275 91.4591 ZT4-7 33.1868 33.1868 33.1868 ZT8-11 48.842600000000004 48.842600000000004 48.842600000000004 ZT12-15 81.167475 71.6904 90.64455000000001 ZT16-19 96.24995000000001 96.24995000000001 96.24995000000001 ZT20-23 108.94149999999999 108.94149999999999 108.94149999999999