condition mean min max ZT0-3 48.296187 48.296187 48.296187 ZT4-7 105.0943645 105.0943645 105.0943645 ZT8-11 102.7455635 102.7455635 102.7455635 ZT12-15 109.3966565 109.3966565 109.3966565 ZT16-19 84.1872465 84.1872465 84.1872465 ZT20-23 43.713737 43.713737 43.713737