condition mean min max ZT0-3 4.5512869254999995 4.238444704 4.864129147 ZT4-7 5.10718174225 4.3129487005 5.901414784 ZT8-11 11.354242829 8.399728033 14.308757625 ZT12-15 10.53712151225 8.1490050395 12.925237984999999 ZT16-19 6.3465128755 5.5550874645 7.1379382865 ZT20-23 9.34980096225 8.478274755 10.2213271695