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 0.1017626375 0.0703146 0.133210675 ZT16-19 0.011809866666666667 0.0 0.023619733333333334 ZT20-23 0 0 0