condition mean min max ZT0-3 0.5979595045 0.550997812 0.6449211970000001 ZT4-7 0.58657566625 0.3438928 0.8292585325 ZT8-11 2.1231273770000003 1.508067928 2.738186826 ZT12-15 3.0840061175 2.9798258925 3.1881863425 ZT16-19 1.0550248075000002 0.964320617 1.145728998 ZT20-23 0.7001204667500001 0.669890603 0.7303503305000001