SOLUTION: Construct the confidence interval for the population mean μ. c=0.90, x overbar =9.4, σ=0.5, and n=50 A 90% confidence interval for μ is? (Round to two decimal pl

Algebra ->  Probability-and-statistics -> SOLUTION: Construct the confidence interval for the population mean μ. c=0.90, x overbar =9.4, σ=0.5, and n=50 A 90% confidence interval for μ is? (Round to two decimal pl      Log On


   

Question 1044816: Construct the confidence interval for the population mean μ.
c=0.90, x overbar =9.4, σ=0.5, and n=50
A 90% confidence interval for μ is? (Round to two decimal places as needed.)
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
90% CI is mean +/- 1.645 (z)*sigma/sqrt (n)
9.4 +/- 1.645*0.5/sqrt(50); this last part, the std error, is 0.1163 or 0.12
(9.28,9.52)