condition mean min max ZT0-3 0.7927357500000001 0.638294 0.9471775 ZT4-7 1.0537969999999999 1.0537969999999999 1.0537969999999999 ZT8-11 0.8863865000000001 0.8863865000000001 0.8863865000000001 ZT12-15 0 0 0 ZT16-19 2.0983165 2.0983165 2.0983165 ZT20-23 1.3484254999999998 1.3484254999999998 1.3484254999999998