condition mean min max ZT0-3 0.35532925 0.2332105 0.477448 ZT4-7 0.7218525 0.7218525 0.7218525 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.9463984999999999 0.9463984999999999 0.9463984999999999