condition mean min max ZT0-3 0.5135585 0.5135585 0.5135585 ZT4-7 0.3599735 0.3599735 0.3599735 ZT8-11 0.399318 0.399318 0.399318 ZT12-15 0.6326455000000001 0.6326455000000001 0.6326455000000001 ZT16-19 1.30673 1.30673 1.30673 ZT20-23 1.008906 1.008906 1.008906