# 9: Confidence Interval for a Population Mean Given Statistics

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.

 Sample Size ($$n$$): Sample Mean ($$\bar{x}$$): Standard Deviation ($$s$$): Confidence Level (enter a decimal):

Output

 Lower Bound: Upper Bound: