condition mean min max ZT0-3 10.63702029925 10.1008013185 11.17323928 ZT4-7 6.9533909465 6.337671364 7.569110529 ZT8-11 11.97487637625 9.0709294075 14.878823345 ZT12-15 12.06770112275 11.900352652999999 12.235049592500001 ZT16-19 8.683225812749999 7.754742627000001 9.6117089985 ZT20-23 13.041250875 12.379243315 13.703258435