condition mean min max ZT0-3 10.346262 10.346262 10.346262 ZT4-7 11.292045000000002 11.292045000000002 11.292045000000002 ZT8-11 10.095915999999999 10.095915999999999 10.095915999999999 ZT12-15 10.003878 10.003878 10.003878 ZT16-19 9.8268985 9.8268985 9.8268985 ZT20-23 10.782927 10.782927 10.782927