condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.03624609 0.016801317333333333 0.05569086266666667 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0