SOLUTION: Construct the confidence interval for the population. mean c = 0.90; x = 8.6 , sigma = 0.6 and n = 42 A 90% confidence interval for is ____ (Round to two decimal places as needed.)

Algebra ->  Probability-and-statistics -> SOLUTION: Construct the confidence interval for the population. mean c = 0.90; x = 8.6 , sigma = 0.6 and n = 42 A 90% confidence interval for is ____ (Round to two decimal places as needed.)      Log On


   

Question 1193141: Construct the confidence interval for the population. mean c = 0.90; x = 8.6 , sigma = 0.6 and n = 42 A 90% confidence interval for is ____ (Round to two decimal places as needed.)
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
the half-interval is z(0.95)*0.6/sqrt(42)
=0.1523
interval is (8.45, 8.75)