condition mean min max ZT0-3 0.04620533333333333 0.0 0.138616 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.11391925 0.0 0.2278385 ZT16-19 0.40724249999999995 0.40724249999999995 0.40724249999999995 ZT20-23 0.0 0.0 0.0