condition mean min max ZT0-3 0.0069719 0.0 0.0139438 ZT4-7 0.0 0.0 0.0 ZT8-11 0.007751999999999999 0.007751999999999999 0.007751999999999999 ZT12-15 0.0 0.0 0.0 ZT16-19 0.008889466666666667 0.008889466666666667 0.008889466666666667 ZT20-23 0.0 0.0 0.0