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WorksheetFunction.F_Inv_RT method (Excel)

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Returns the inverse of the right-tailed F probability distribution. If p = F_DIST_RT(x,...), then F_INV_RT(p,...) = x.

Syntax

expression.F_Inv_RT (Arg1, Arg2, Arg3)

expression A variable that represents a WorksheetFunction object.

Parameters

Name Required/Optional Data type Description
Arg1 Required Double Probability - a probability associated with the F cumulative distribution.
Arg2 Required Double Degrees_freedom1 - the numerator degrees of freedom.
Arg3 Required Double Degrees_freedom2 - the denominator degrees of freedom.

Return value

Double

Remarks

The F distribution can be used in an F-test that compares the degree of variability in two data sets. For example, you can analyze income distributions in the United States and Canada to determine whether the two countries/regions have a similar degree of income diversity.

If any argument is nonnumeric, F_Inv_RT returns the #VALUE! error value.

If probability < 0 or probability > 1, F_Inv_RT returns the #NUM! error value.

If degrees_freedom1 or degrees_freedom2 is not an integer, it is truncated.

If degrees_freedom1 < 1 or degrees_freedom1 ≥ 10^10, F_Inv_RT returns the #NUM! error value.

If degrees_freedom2 < 1 or degrees_freedom2 ≥ 10^10, F_Inv_RT returns the #NUM! error value.

F_Inv_RT can be used to return critical values from the F distribution. For example, the output of an ANOVA calculation often includes data for the F statistic, F probability, and F critical value at the 0.05 significance level. To return the critical value of F, use the significance level as the probability argument to F_Inv_RT.

Given a value for probability, F_Inv_RT seeks that value x such that F_DIST_RT(x, degrees_freedom1, degrees_freedom2) = probability. Thus, precision of F_Inv_RT depends on precision of F_Dist_RT. F_Inv_RT uses an iterative search technique. If the search has not converged after 64 iterations, the function returns the #N/A error value.

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