## Confidence Interval for Mean

- STATISTICS

Introduction Confidence interval can be used to estimate the population parameter with the help of an interval with some degree of confidence. One such a parameter that can be estimated is a population mean.
In this article we will discuss step by step procedure to construct a confidence interval for population mean when the population standard deviation is known.
Confidence Interval for Mean Let $X_1, X_2, \cdots , X_{n}$ be a random sample of size $n$ from $N(\mu, \sigma^2)$ with known variance $\sigma^2$.