# 7: Confidence Interval for a Population Proportion

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: