condition mean min max ZT0-3 0.371145 0.189095 0.553195 ZT4-7 1.538645 1.538645 1.538645 ZT8-11 0.5656395000000001 0.5656395000000001 0.5656395000000001 ZT12-15 0 0 0 ZT16-19 0.5568869999999999 0.5568869999999999 0.5568869999999999 ZT20-23 1.680965 1.680965 1.680965