11-7. A random sample is to be drawn from a population that is N(, ), with 2...

11-7. A random sample is to be drawn from a population that is N(μ, σ), with

σ2 known. One objective is to use X to estimate μ to within k units with 100(1−α)% reliability. Solve for the sample size n required to meet these conditions from the following probability statement: P(|X − μ| ≤ k) =

1 − α.