condition mean min max ZT0-3 0.30562416666666664 0.0 0.9168725 ZT4-7 0.0 0.0 0.0 ZT8-11 0.232278 0.232278 0.232278 ZT12-15 0.6113395 0.483309 0.7393700000000001 ZT16-19 0.67305 0.67305 0.67305 ZT20-23 1.7167485 1.7167485 1.7167485