The duration of telephone calls directed by a local

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The duration of telephone calls directed by a local telephone company: σ=4.2 minutes, n=500, 97% confidence. Use the confidence level and sample data to find the margin of error E.

A. 0.018 min

B. 0.408 min

C. 0.009 min

D. 0.087 min

Reference no: EM13470784

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