Solution Found!
For a normal population with known variance ?2 :
Chapter 8, Problem 2E(choose chapter or problem)
For a normal population with known variance \(\sigma^2\) :
(a) What value of \(z_{\alpha / 2}\) in Equation 8-5 gives 98% confidence?
(b) What value of \(z_{\alpha / 2}\) in Equation 8-5 gives 80% confidence?
(c) What value of \(z_{\alpha / 2}\) in Equation 8-5 gives 75% confidence?
Questions & Answers
QUESTION:
For a normal population with known variance \(\sigma^2\) :
(a) What value of \(z_{\alpha / 2}\) in Equation 8-5 gives 98% confidence?
(b) What value of \(z_{\alpha / 2}\) in Equation 8-5 gives 80% confidence?
(c) What value of \(z_{\alpha / 2}\) in Equation 8-5 gives 75% confidence?
ANSWER:Step 1 of 5
For a sample mean, , of a random sample of size n from a normal population with known variance , a Confidence Interval on is given by,