condition mean min max ZT0-3 0.011808866666666668 0.0 0.023617733333333335 ZT4-7 0.0 0.0 0.0 ZT8-11 0.013293 0.013293 0.013293 ZT12-15 0.00704905 0.0 0.0140981 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0