F-ratio


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F-ratio

Etymology: Sir Ronald Aylmer Fisher, British statistician, 1890-1962
1 the variance between the means of several groups relative to the variance within the groups, used in the F-test in the analysis of variance.
2 the variance between or within treatments.

F-ratio (F-test),

n a value used in determining whether the difference between two variables is statistically significant or stable. A larger variance is divided by a smaller variance, both of which are the results of analysis of variance procedures. The value for F is looked up in a table that shows the probability of occurrence of a ratio of this size.
References in periodicals archive ?
During the parabolizing phase he learned that the amount of glass removed when transitioning from a spheroid to a paraboloid increases exponentially with decreasing f-ratio.
Statistically significant differences were found on the larval abundance among the samples (one-way ANOVA; F-ratio = 34,2; df = 11, 18; P < 0.
The calculated values of F-ratio are greater than the tabulated values at 96% confidence level, which means the developed mathematical model is considered to be adequate.
1979) was used where F-ratio was statistically significant to determine which group differed significantly from each other (p<.