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Statistics Calculators for Math 105
9: Confidence Interval for a Population Mean Given Statistics

9: Confidence Interval for a Population Mean Given Statistics

Last updated

May 10, 2025
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- 8: Sample Size to Estimate a Population Proportion
- 10: Confidence Interval for a Population Mean Given Data

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Confidence Interval for a Population Mean Given Statistics

This calculator creates a confidence interval for a population mean 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 sample mean ( $\bar{x}$ ), the sample standard deviation ( $s$ ), and the confidence level (CL), then click Calculate. Write the confidence level as a decimal. For example, for a 95% confidence level, enter 0.95.

$\sigma$ Unknown

$\bar{x}$ :

CL:

Output

Lower Bound

Upper Bound

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