condition mean min max ZT0-3 3137.543685 3137.543685 3137.543685 ZT4-7 3700.2335540000004 3700.2335540000004 3700.2335540000004 ZT8-11 3179.8229490000003 3179.8229490000003 3179.8229490000003 ZT12-15 3425.671647 3425.671647 3425.671647 ZT16-19 2837.8891230000004 2837.8891230000004 2837.8891230000004 ZT20-23 2100.3768465 2100.3768465 2100.3768465