F-ratio (disambiguation)
From Infogalactic: the planetary knowledge core
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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