condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0103374 0.0103374 0.0103374 ZT12-15 0.024768783333333336 0.016647166666666668 0.0328904 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0