condition mean min max ZT0-3 0.022153183333333333 0.0 0.03363635 ZT4-7 0.0321172 0.0321172 0.0321172 ZT8-11 0.0675466 0.0675466 0.0675466 ZT12-15 0.055375125 0.03740075 0.0733495 ZT16-19 0.0641739 0.0641739 0.0641739 ZT20-23 0.0 0.0 0.0