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Solve the Problem σ\sigma = 24 Years, Find the Margin of Error in Estimating

Question 44

Multiple Choice

Solve the problem.
-A sample of 35 washing machines yields a mean replacement time of 9.0 years. Assuming that σ\sigma = 2.4 years, find the margin of error in estimating μ\mu at the 90% level of confidence.


A) 0.7 years
B) 0.5 years
C) 2.5 years
D) 0.1 years

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