condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.013494628666666668 0.0 0.026989257333333336 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0120976485 0.0 0.024195297 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0