WorksheetFunction.ChiDist Method

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Excel Developer Reference

Returns the one-tailed probability of the chi-squared distribution.

Syntax

expression.ChiDist(Arg1, Arg2)

expression   A variable that represents a WorksheetFunction object.

Parameters

Name Required/Optional Data Type Description
Arg1 Required Double The value at which you want to evaluate the distribution.
Arg2 Required Double The number of degrees of freedom.

Return Value
Double

Remarks

The χ2 distribution is associated with a χ2 test. Use the χ2 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.

  • If either argument is nonnumeric, ChiDist generates an error.
  • If x is negative, ChiDist generates an error.
  • If degrees_freedom is not an integer, it is truncated.
  • If degrees_freedom < 1 or degrees_freedom > 10^10, ChiDist generates an error.
  • ChiDist is calculated as ChiDist = P(X>x), where X is a χ2 random variable.

See Also