Overview for 2 Proportions

Use 2 Proportions 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 Stat > Basic Statistics > 2 Proportions.

When to use an alternate analysis

If your data contain counts, such as the number of defects per unit, use 2-Sample Poisson Rate. For more information on data types, go to Data types you can analyze with a hypothesis test.

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