# CHIDIST

 Archived content. No warranty is made as to technical accuracy. Content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.

Returns the one-tailed probability of the chi-squared distribution. The 2 distribution is associated with a 2 test. Use the 2 test to compare observed and expected values. For example, a genetic experiment might hypothesize that the next generation of plants will exhibit a certain set of colors. By comparing the observed results with the expected ones, you can decide whether your original hypothesis is valid.

Syntax

CHIDIST ( x , degrees_freedom )

X is the value at which you want to evaluate the distribution.

Degrees_freedom is the number of degrees of freedom.

Remarks

• If either argument is nonnumeric, CHIDIST returns the #VALUE! error value.

• If x is negative, CHIDIST returns the #NUM! error value.

• If degrees_freedom is not an integer, it is truncated.

• If degrees_freedom < 1 or degrees_freedom 10^10, CHIDIST returns the #NUM! error value.

• CHIDIST is calculated as CHIDIST = P(X>x), where X is a 2 random variable.

Example

X

DegreesFreedom

Formula

Description (Result)

18.307

10

=CHIDIST([X],[DegreesFreedom])

One-tailed probability of the chi-squared distribution, for the specified arguments (0.050001)