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CHIDIST

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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)

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