Description Usage Arguments Details Value Author(s) References See Also Examples

Computes the eta coefficient for data from a complex survey design with usage of plausible values.

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`formula` |
Formula, x~y for the eta coefficient between x and y (both variables have to be part of a survey design objecct created by the |

`design` |
A survey design which was generated by the |

`placeholder` |
A vector of symbols, which were used for numbering of the plausible values. For a detailed description see in 'details'. |

All variables mentioned in the formula object must be part of the survey design object. Instead of the symbols, which were used for numbering the plausible values use '..' as notation (e.g. placeholder = 1:5 and PVLIT.. stands for PVLIT1, PVLIT2, PVLIT3, PVLIT4, PVLIT5).Missing values are deleted listwise.

The function returns a data.frame with the following columns

`ETA` |
Shows the eta coefficient between x and y. |

`SE` |
Shows the SE for the eta coefficient. |

`Number.of.cases` |
Shows the unweighted number of cases (NA's excluded) within each group. |

`Sum.of.weights` |
Shows the sum of weights (NA's excluded) within each group. |

Jakob Peterbauer

Lumley, T. (2010). *Complex Surveys*. Hoboken, NJ: Wiley.

Saerndal, C.-E. & Swensson, B. & Wretman, J. (1992). *Model Assisted Survey Sampling*. New York: Springer.

Chaudhuri, A. & Stenger, H. (2005). *Survey Sampling. Theory and Methods*. Boka Raton, FL: Chapman & Hall/CRC.

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