SOLUTION: (Standard deviation symbol will be O)Determine a 90% confidence interval for µ if O = 6, x = 72, and n =81
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Question 1182013: (Standard deviation symbol will be O)Determine a 90% confidence interval for µ if O = 6, x = 72, and n =81 Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! half-interval is z(0.95)*sigma/sqrt(81)
=1.645*6/sqrt(81)
=(2/3)*1.645
=1.097 or 1.10
the 90% CI will be (70.9, 73.1)
