condition mean min max ZT0-3 0.7894140000000001 0.531467 1.047361 ZT4-7 0.840205 0.840205 0.840205 ZT8-11 1.0283324999999999 1.0283324999999999 1.0283324999999999 ZT12-15 0 0 0 ZT16-19 2.126795 2.126795 2.126795 ZT20-23 0.899024 0.899024 0.899024