Inferences about equality of proportions

Inferences about the proportions in populations are made using random samples of data drawn from each population of interest.

• Equality of proportions hypothesis test
  A hypothesis test formally tests if the proportions in two or more populations are equal.
• Exact and asymptotic p-values
  Asymptotic p-values are useful for large sample sizes when the calculation of an exact p-value is too computer-intensive.
• Wald, Score, Likelihood ratio
  Three different ways are used to make large sample inferences all using a X² statistic, so it is important to understand the differences to avoid confusion.