condition mean min max ZT0-3 1284.962826 1284.962826 1284.962826 ZT4-7 1683.54367 1683.54367 1683.54367 ZT8-11 1828.5744505 1828.5744505 1828.5744505 ZT12-15 1632.1637885 1632.1637885 1632.1637885 ZT16-19 1304.081731 1304.081731 1304.081731 ZT20-23 1209.059545 1209.059545 1209.059545