condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.03913737933333334 0.0 0.07827475866666668 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