R: Woolf Test

woolf_test {vcd} | R Documentation

## Woolf Test

### Description

Test for homogeneity on 2 x 2 x k tables over strata (i.e., whether the log odds ratios are the same in all strata).

### Usage

    woolf_test(x)

### Arguments

`x` | A 2 x 2 x k table.

### Value

A list of class `"htest"` containing the following components:

`statistic` | the chi-squared test statistic.
`parameter` | degrees of freedom of the approximate chi-squared distribution of the test statistic.
`p.value` | p-value for the test.
`method` | a character string indicating the type of test performed.
`data.name` | a character string giving the name(s) of the data.
`observed` | the observed counts.
`expected` | the expected counts under the null hypothesis.

### References

Woolf, B. 1955. On estimating the relation between blood group and disease. Ann. Human Genet. (London) 19, 251-253.

### See Also

`mantelhaen.test`

### Examples

    data("CoalMiners")
    woolf_test(CoalMiners)

[Package vcd version 1.4-4 Index]