condition mean min max ZT0-3 0.30748533333333333 0.30748533333333333 0.30748533333333333 ZT4-7 0.1715785 0.1715785 0.1715785 ZT8-11 0.1780325 0.1780325 0.1780325 ZT12-15 0.384531 0.384531 0.384531 ZT16-19 0.35992799999999997 0.35992799999999997 0.35992799999999997 ZT20-23 0.0 0.0 0.0