vcd (version 0.1-3.5)

woolf.test: Woolf test

Description

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

Usage

woolf.test(x)

Arguments

x

A 2x2xk-table.

Value

• A list with class `"htest"' containing the following components:
• statistic
  the value the chi-squared test statistic.
• parameter
  the degrees of freedom of the approximate chi-squared distribution of the test statistic.
• p.value
  the 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.

See Also

mantelhaen.test

Examples

data(CoalMiners)
woolf.test(CoalMiners)