F-probability distribution

Returns the right-tailed distribution (F-probability) of a random variable. This function is used to determine the difference, in degrees of diversity, between two data sets. For example, test scores administered to males and females entering high school can be examined using this function to determine whether the variability in females is different from that found in males.

Syntax

FDistribution(x, df1, df2)

Where:

x is the value at which the function is evaluated.

df1 represents the degrees of freedom of numerator values.

df2 represents the degrees of freedom of denominator values.

Expression

Where:

F is a random variable that has an F distribution.

Usage Notes

If df1 or df2 is not an integer, it is truncated.

The following conditions are invalid:

• An argument is non-numeric
• x<0
• df1 < 1
• df2 < 1