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An executive at the accounting firm is interested in measuring the average quarterly earnings at each of the companies several hundred agricultural investment firms. The

An executive at the accounting firm is interested in measuring the average quarterly earnings at each of the companies several hundred agricultural investment firms. The average earnings for each company is $1.21 million with a standard deviation of $0.473 million.

Compute the standard error for the distribution of the sample mean of a group of 15 companies chosen at random.

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