condition mean min max ZT0-3 3121.155134 3121.155134 3121.155134 ZT4-7 2653.172503 2653.172503 2653.172503 ZT8-11 1571.6539505 1571.6539505 1571.6539505 ZT12-15 1129.5445125 1129.5445125 1129.5445125 ZT16-19 854.759092 854.759092 854.759092 ZT20-23 1212.2604075 1212.2604075 1212.2604075