condition mean min max ZT0-3 1869.874157 1869.874157 1869.874157 ZT4-7 2150.974353 2150.974353 2150.974353 ZT8-11 2078.9263935 2078.9263935 2078.9263935 ZT12-15 2052.883848 2052.883848 2052.883848 ZT16-19 1448.4789580000001 1448.4789580000001 1448.4789580000001 ZT20-23 1963.1572475 1963.1572475 1963.1572475