condition mean min max ZT0-3 0.14681933333333333 0.0 0.440458 ZT4-7 0.5181 0.5181 0.5181 ZT8-11 0.0 0.0 0.0 ZT12-15 0.4309525 0.0 0.861905 ZT16-19 0.0 0.0 0.0 ZT20-23 0.594495 0.594495 0.594495