condition mean min max ZT0-3 0.3494695 0.3494695 0.3494695 ZT4-7 0.551137 0.551137 0.551137 ZT8-11 0.17086410000000002 0.17086410000000002 0.17086410000000002 ZT12-15 0.2336955 0.2336955 0.2336955 ZT16-19 0.13713785 0.13713785 0.13713785 ZT20-23 0.6991665 0.6991665 0.6991665