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Use the Confidence Level and Sample Data to Find a Confidence

Question 4

Multiple Choice

Use the confidence level and sample data to find a confidence interval for estimating the population µ.
-The duration of telephone calls directed by a local telephone company: σ=4.1\sigma = 4.1 minutes, n=540\mathrm { n } = 540 , 97 percent confidence.


A) 0.008 minutes
B) 0.016 minutes
C) 0.081 minutes
D) 0.383 minutes

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