condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0249641 0.0249641 0.0249641 ZT8-11 0.0272999 0.0272999 0.0272999 ZT12-15 0.074685 0.074685 0.074685 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0