condition mean min max ZT0-3 4.6886149999999995 4.4547799999999995 4.9224499999999995 ZT4-7 5.782845 5.782845 5.782845 ZT8-11 5.78116 5.78116 5.78116 ZT12-15 0 0 0 ZT16-19 7.991865 7.991865 7.991865 ZT20-23 6.73712 6.73712 6.73712