condition mean min max ZT0-3 2.898924 1.951803 3.846045 ZT4-7 1.9622950000000001 1.9622950000000001 1.9622950000000001 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 1.9222975 1.9222975 1.9222975 ZT20-23 8.48097 8.48097 8.48097