# 23: Confidence Interval for a Mean (With Statistics) Calculator


CONFIDENCE INTERVAL CALCULATOR WITH STATISTICS (SIGMA KNOWN)

Fill in the sample size (n), the sample mean ($$\bar{x}$$), the population standard deviation ($$\sigma$$), 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 confidence interval will be calculated for you.

 n: $$\bar{x}$$: CL: $$\sigma$$:
 Lower Bound Upper Bound

23: Confidence Interval for a Mean (With Statistics) Calculator is shared under a CC BY license and was authored, remixed, and/or curated by Larry Green.