Question: Find a confidence interval for μ assuming that each sample is from a normal population.

a. \(\bar{X}\) = 14, σ = 4, n = 5, 90 percent confidence

b. \(\bar{X}\) = 37, σ = 5, n = 15, 99 percent confidence

c. \(\bar{X}\) = 121, σ = 15, n = 25, 95 percent confidence