condition mean min max ZT0-3 0.0090832 0.0 0.0181664 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0067843999999999995 0.0 0.013568799999999999 ZT20-23 0 0 0