# Population Mean (with known standard deviation) Confidence Interval Calculator

Compute the 90%, 95%, and 99% confidence intervals for the mean of a normal population when the population standard deviation is known, given the population standard deviation, the sample mean, and the sample size. Knowing the confidence interval for the mean of a normal population can be very useful for assessing the true nature of the population in analytics studies that rely on normally distributed sample data.

Please provide the necessary values, and then click 'Calculate'.