F-ratio

F-ratio or f-ratio may refer to:

  • The F-ratio used in statistics, which relates the variances of independent samples; see F-distribution
  • f-ratio (oceanography), which relates recycled and total primary production in the surface ocean
  • f-number, f-ratio, or focal ratio, the ratio of the focal length of an optical system to the diameter of its entrance pupil

See also
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