In: Statistics and Probability
For a normal population with known variance (sigma)^2, what is the confidence level for the CI (mean)-2.14(sigma)/√n≤μ≤(mean)+2.14(sigma)/√n ?
For a normal population with known variance and the confidence level for the CI
is the standard error value and 2.14 is the Standard score for the confidence level hence using Z score table shown below we can find that
The confidence level would be around 96.76 % or 97 %.
The Table shown below