A department store conducted a study regarding the mean distance customers live from the store....
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A department store conducted a study regarding the mean distance customers live from the store. The store randomlyselected 230 customers and found they lived a mean distance of 18.1 miles from the store. The department also found thestandard deviation of the sample to be 3.6 miles. What is the margin of error, assuming a 90% confidence level?A. +0.24B. +0.47C. 0.36D. 0.39
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