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