condition mean min max ZT0-3 7.020635852250001 6.2458936575 7.795378047000001 ZT4-7 6.177166829 5.9117232155 6.4426104424999995 ZT8-11 4.342878028 4.2672016055 4.4185544505 ZT12-15 6.5656787035 4.5513997349999995 8.579957671999999 ZT16-19 10.660865131249999 9.5671170425 11.75461322 ZT20-23 11.0714365945 9.909742429 12.23313076