condition mean min max ZT0-3 0.106316 0.0 0.212632 ZT4-7 0.4259885 0.4259885 0.4259885 ZT8-11 0.6434960000000001 0.6434960000000001 0.6434960000000001 ZT12-15 0 0 0 ZT16-19 0.62604 0.62604 0.62604 ZT20-23 0.211027 0.211027 0.211027