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For a normal population with known variance (sigma)^2, what is the confidence level for the CI...

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 ?

Solutions

Expert Solution

For a normal population with known variance and the confidence level for the CI

Here,

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

orchestra answered 2 years ago
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