condition mean min max ZT0-3 0.4034745 0.4034745 0.4034745 ZT4-7 0.16659835 0.16659835 0.16659835 ZT8-11 0.44719000000000003 0.44719000000000003 0.44719000000000003 ZT12-15 1.208535 1.208535 1.208535 ZT16-19 1.815725 1.815725 1.815725 ZT20-23 0.67726 0.67726 0.67726