condition mean min max ZT0-3 0.019283425 0.0191812 0.01938565 ZT4-7 0.01893705 0.01893705 0.01893705 ZT8-11 0.0201198 0.0201198 0.0201198 ZT12-15 0 0 0 ZT16-19 0.01898515 0.01898515 0.01898515 ZT20-23 0.0 0.0 0.0