# is.geom

### Description

judge if the data obeys geometric distribution.

### Usage

1 |

### Arguments

`x` |
data |

`a` |
significance level |

`p0` |
the pobability of success |

### Details

Given a set of observations from a certain distribution, this function is used to test whether the observations are from a distribution of Geometric distribution or not. Usually, to ensure the function works well, the sample size needs to be large enough, i.e. the result will be stable if the sample size is larger than 100. The Geometric distribution mentioned in this function is defined as the repetition of Bernoulli when the first success occurs. The observations of geometric distribution must be positive integer.

### Value

if the data possibly obeys geometric distribution, return a value named qchisq which represents the possibility. The larger qchisq is, the larger the possibility will be; else return -1.

### Note

please play attention to the definition of parameters in our functions.

### Author(s)

JunYao Chen, CuiYi He, BoXian Wei

### References

ROBERT V. HOGG/ALLEN T. CRAIG (Fifth Edition) Introduction Mathematical Statistics.

### See Also

`is.dt`

, `DnE-package`

### Examples

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