condition mean min max ZT0-3 0.2529755 0.2355525 0.2703985 ZT4-7 2.3106195 2.3106195 2.3106195 ZT8-11 0.5334925 0.5334925 0.5334925 ZT12-15 0 0 0 ZT16-19 11.867594 11.867594 11.867594 ZT20-23 0.6006535 0.6006535 0.6006535