# Manuals/calci/CHIDIST

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**CHIDIST (Number,DegreeOfFreedom)**

- is the value for which distribution is evaluated.
- is the number of degrees of freedom.
- CHIDIST(), returns the one-tailed probability of the chi-squared distribution.

## Description

- This function gives the one_tailed probability of the chi-squared distribution.
- It is denoted by distribution.
- Normally categorical data's may displayed in tables.
- The static used to compare the observed value in each table to the assumed value.
- The conditions of test is

- The table should be 2x2 or more than 2x2
- Each observations should not be dependent
- All expected values should be 10 or greater.

- The test statistic is:

The degrees of freedom is: (r–1)(c–1)

- r = No. of rows
- c = No. of columns

Where:

- Oi-the observed value in the ith cell
- Ei- the expected value in the ith cell

Also this function will the result as Error when

- The & values are non-numeric
- The value is negative or value is not an integer
- The or
- Here CHIDIST=P(X>x),where X is a random variable.

- CHIDIST(-2,1)=Error, because Number is negative.
- CHIDIST(2,-1)=Error, because Degreeoffreedom<1

## ZOS

- The syntax is to calculate CHIDIST in ZOS is CHIDIST(Number,Degreeoffreedom).
- is the value for which distribution is evaluated.
- is the number of degrees of freedom.
- For e.g.,CHIDIST(10..12,5.1..7.1..0.6)

## Examples

CHIDIST(Number,Degreeoffreedom) | x | df | RESULT |
---|---|---|---|

CHIDIST(18,2) | 18 | 2 | 0.0001234098 |

CHIDIST(15,1) | 15 | 1 | 0.0001075112 |

CHIDIST(2,1) | 2 | 1 | 0.157299207050 |

CHIDIST(-2,1) | -2 | 1 | #N/A (NUMBER > 0) |

CHIDIST(2,-1) | 2 | -1 | null |

## Related Videos

## See Also

## References