condition mean min max ZT0-3 0.9092203333333333 0.856432 0.9636095 ZT4-7 0.9024449999999999 0.9024449999999999 0.9024449999999999 ZT8-11 0.738983 0.738983 0.738983 ZT12-15 1.3279265 1.135088 1.520765 ZT16-19 0.7003975 0.7003975 0.7003975 ZT20-23 0.9214819999999999 0.9214819999999999 0.9214819999999999