What is the Proportion Test Calculator?

The Proportion Test Calculator is a statistical tool that helps users determine whether the observed proportion in a sample is significantly different from a hypothesized population proportion. By entering the number of successes, sample size, hypothesized proportion, and selecting the type of test, the calculator quickly computes the sample proportion, z-statistic, and p-value. This makes it easier for students, researchers, and analysts to perform hypothesis testing and evaluate statistical significance without manual calculations.

How to Use:

1. Enter Number of Successes (x): Input the count of successful outcomes in your sample.
2. Enter Sample Size (n): Provide the total number of observations.
3. Enter Hypothesized Proportion (p₀): Type the population proportion you want to test against.
4. Select Tail Type: Choose right-tailed, left-tailed, or two-tailed based on your alternative hypothesis.
5. Click “Calculate”: The tool computes p̂, z-statistic, and p-value instantly.
6. Review Result: The output section displays all calculated values so you can clearly interpret whether your sample proportion supports or rejects the hypothesis.