FDistribution Command

FDistribution( <Numerator Degrees of Freedom>, <Denominator Degrees of Freedom>, <Variable Value> ): Calculates the value of the cumulative distribution function of an F-distribution at variable value v, i.e. the probability P(X≤v) where X is a random variable with F-distribution with given numerator and denominator degrees of freedom.

This syntax returns the probability at a given value, that is the area under the F-distribution curve to the left of the given x-coordinate.

FDistribution( <Numerator Degrees of Freedom>, <Denominator Degrees of Freedom>, <Variable Value>, <Boolean Cumulative> ): If Cumulative = true, calculates the value of the cumulative distribution function of an F-distribution with given numerator and denominator degrees of freedom at the given variable value, otherwise it calculates the probability density function of the F-distribution at variable value.
FDistribution( <Numerator Degrees of Freedom>, <Denominator Degrees of Freedom>, x, <Boolean Cumulative> ): If Cumulative = true, creates the cumulative density function (cdf) of an F-distribution with given numerator and denominator degrees of freedom, othewise it creates the probability density function (pdf) of the distribution.

This command is also available in the CAS View.