condition mean min max ZT0-3 0.0348648 0.0348648 0.0348648 ZT4-7 0.04427415 0.04427415 0.04427415 ZT8-11 0.0089851 0.0089851 0.0089851 ZT12-15 0.0 0.0 0.0 ZT16-19 0.08660085000000001 0.08660085000000001 0.08660085000000001 ZT20-23 0.0095285 0.0095285 0.0095285