condition mean min max ZT0-3 0.9633995 0.9633995 0.9633995 ZT4-7 0.61041 0.61041 0.61041 ZT8-11 0.8867175 0.8867175 0.8867175 ZT12-15 1.22741 1.22741 1.22741 ZT16-19 3.5240799999999997 3.5240799999999997 3.5240799999999997 ZT20-23 1.840165 1.840165 1.840165