condition mean min max ZT0-3 0.0203372 0.0 0.0405594 ZT4-7 0.0193037 0.0193037 0.0193037 ZT8-11 0.0196202 0.0196202 0.0196202 ZT12-15 0.009779525 0.0 0.01955905 ZT16-19 0.01825985 0.01825985 0.01825985 ZT20-23 0.0206071 0.0206071 0.0206071