to do the following when your data contain only two categories, such as pass/fail:
- Determine whether the population proportions of two groups differ.
- Calculate a range of values that is likely to include the difference between the population proportions.
For example, a market research analyst wants know whether the proportion of consumers who return a survey increases by providing an incentive such as a product sample.
Where to find this analysis
To perform a 2 proportions test, choose