# 7: Confidence Interval for a Population Proportion

- Page ID
- 19742

Confidence Interval for a Population Proportion

This calculator creates confidence intervals for a population proportion given statistics. Please report the error to Dr. Jessica Kuang at jkuangATvcccd.edu.

To learn how to use this calculator, please watch a short video here.

**Input**

Fill in the sample size (\(n\)), the number of successes (\(x\)), and the confidence level (CL), then hit Calculate. Write the confidence level as a decimal. For example, for a 95% confidence level, enter 0.95.

Sample Size (\(n\)): | Number of Successes (\(X\)): | Confidence Level (enter a decimal): |

**Output**

Point Estimate (\(\hat{p}\)): | Lower Bound: | Upper Bound: |

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