condition mean min max ZT0-3 0.0114347 0.0114347 0.0114347 ZT4-7 0.01502945 0.01502945 0.01502945 ZT8-11 0.0399346 0.0399346 0.0399346 ZT12-15 0.0303813 0.0303813 0.0303813 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0111717 0.0111717 0.0111717