condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.008091419 0.0 0.016182838 ZT8-11 0.0 0.0 0.0 ZT12-15 0.021907253166666668 0.019865711666666667 0.023948794666666665 ZT16-19 0.008906312000000001 0.0 0.017812624000000003 ZT20-23 0.0296012875 0.017668348 0.041534227