condition mean min max ZT0-3 2005.93469 2005.93469 2005.93469 ZT4-7 1932.222797 1932.222797 1932.222797 ZT8-11 1672.8307335 1672.8307335 1672.8307335 ZT12-15 1688.687002 1688.687002 1688.687002 ZT16-19 1781.354663 1781.354663 1781.354663 ZT20-23 2004.6607920000001 2004.6607920000001 2004.6607920000001