condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0055777000000000005 0.0055777000000000005 0.0055777000000000005 ZT16-19 0.007782583333333333 0.007782583333333333 0.007782583333333333 ZT20-23 0.004590625 0.004590625 0.004590625