condition mean min max ZT0-3 0.04211795425 0.0 0.0842359085 ZT4-7 0.0 0.0 0.0 ZT8-11 0.5732577219999999 0.186862838 0.9596526059999999 ZT12-15 1.64647798775 1.3380529605 1.954903015 ZT16-19 1.230774649 0.6154870135 1.8460622844999999 ZT20-23 0.4383338295 0.4290616805 0.4476059785