condition mean min max ZT0-3 0.016755166666666665 0.0 0.0502655 ZT4-7 0.0488729 0.0488729 0.0488729 ZT8-11 0.0 0.0 0.0 ZT12-15 0.026266900000000003 0.0 0.052533800000000005 ZT16-19 0.0959003 0.0959003 0.0959003 ZT20-23 0.05409105 0.05409105 0.05409105