condition mean min max ZT0-3 1.01882149475 0.6039458355 1.433697154 ZT4-7 1.2784231962500001 0.7889120340000001 1.7679343585000002 ZT8-11 0.75412862575 0.613633597 0.8946236545 ZT12-15 0.38075229624999996 0.31651700299999996 0.4449875895 ZT16-19 0.9023125117499999 0.5792329755000001 1.2253920479999998 ZT20-23 4.601662194 1.462236884 7.741087504