weighted.moments {acid} | R Documentation |

## Moments of a Random Variable

### Description

This functions calculates the first three moments as well as mean, standard deviation and skewness for a vector of observations with corresponding weights.

### Usage

```
weighted.moments(x, w8 = NULL)
```

### Arguments

`x` |
a vector of observations. |

`w8` |
a vector of weights. |

### Value

`fm` |
returns the first moment. |

`weighted.mean` |
returns the mean. |

`sm` |
returns the second moment. |

`weighted.sd` |
returns the uncorrected (population) standard deviation. |

`wtd.sd` |
returns the sample-size corrected standard deviation estimate. |

`tm` |
returns the third moment. |

`w.skew.SAS` |
returns the skewness estimate as implemented in SAS. |

`w.skew.Stata` |
returns the skewness estimate as implemented in Stata. |

### Author(s)

Alexander Sohn

### See Also

[Package

*acid*version 1.1 Index]