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 0.059597135333333336 0.0 0.11919427066666667 ZT16-19 0.03268246 0.0 0.06536492 ZT20-23 0.0 0.0 0.0