# 11: Sample Size to Estimate a Population Mean

- Page ID
- 19750

Sample Size to Estimate a Population Mean

This calculator calculates the sample size needed to estimate a population mean. 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 population standard deviation (\(\sigma\)), the error bound (E), and the confidence level (CL). Write the confidence level as a decimal. For example, for a 95% confidence level, enter 0.95 for CL. Then hit Calculate and assuming the population is normally distributed, the necessary sample size will be shown.

Standard Deviation (\(\sigma\)): | Error Bound (E): | Confidence Level (enter a decimal): |

**Output**

Sample Size (n): |

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