condition mean min max ZT0-3 0.15780475 0.1576985 0.157911 ZT4-7 0.472282 0.472282 0.472282 ZT8-11 0.4732005 0.4732005 0.4732005 ZT12-15 0 0 0 ZT16-19 0.6215795 0.6215795 0.6215795 ZT20-23 0.469189 0.469189 0.469189