The standard deviation of the 2014 gross sales of all corporations is known to be $16.06 billion.
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The standard deviation of the 2014 gross sales of all corporations is known to be $16.06 billion. Let x̅ be the mean of the 2014 gross sales of a sample of corporations. What sample size will produce the standard deviation of x̅ equal to $2.15 billion? Assume n∕N ≤ .05.
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