R: Abortion Opinion Data

Abortion {vcdExtra} | R Documentation

## Abortion Opinion Data

### Description

Opinions about abortion classified by gender and SES

### Usage

    data(Abortion)

### Format

A 3-dimensional array resulting from cross-tabulating 3 variables for 1100 observations. The variable names and their levels are:

No | Name | Levels
1 | `Sex` | `"Female", "Male"`
2 | `Status` | `"Lo", "Hi"`
3 | `Support_Abortion` | `"Yes", "No"`

### Details

The combinations of `Sex` and `Status` represent four independent samples, having fixed `Sex`-`Status` marginal totals. Thus the `Sex:Status` association must be included in any loglinear model. `Support_Abortion` is a natural response variable.

### Source

Christensen, R. (1990). Log-Linear Models, New York, NY: Springer-Verlag, p. 92, Example 3.5.2.

Christensen, R. (1997). Log-Linear Models and Logistic Regression, New York, NY: Springer, p. 100, Example 3.5.2.

### Examples

    data(Abortion)

    # example goes here
    ftable(Abortion)
    mosaic(Abortion, shade=TRUE)

    # stratified by Sex
    fourfold(aperm(Abortion, 3:1))
    # stratified by Status
    fourfold(aperm(Abortion, c(3,1,2)))

[Package vcdExtra version 0.7-1 Index]