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Statistical function
F.DIST
Returns the left-tailed F probability distribution.
Rarely usedDifficulty 1550 · AdvancedUsage rank #437 of 520
When to use it
The left-tailed F distribution, the ratio of two variances. Cumulative TRUE gives the probability of a ratio at or below x.
The shape of it
- Syntax
=F.DIST(x, deg_freedom1, deg_freedom2, cumulative)
Worked examples
Cumulative
=F.DIST(4,2,10,TRUE) → 0.947078
An F of 4 on (2,10) degrees of freedom is at the 94.7th percentile.
Median
=F.DIST(1,5,5,TRUE) → 0.5
Equal degrees of freedom put the median at 1.
Density
=F.DIST(4,2,10,FALSE) → 0.029401
The density at 4.
Worth knowing
- ANOVA p-values use the right tail: F.DIST.RT.
- The first df is the numerator (between groups), the second the denominator (within groups).
- Degrees of freedom are truncated.
Where it goes wrong
- #NUM! for negative x or df below 1.
- The cumulative flag is required.
Related
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