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A sample containing the monthly returns for 75 U.S. stocks has a mean of 5% and a standard deviation of 12%. The standard error of

A sample containing the monthly returns for 75 U.S. stocks has a mean of 5% and a standard deviation of 12%. The standard error of the sample mean:

a. Approximately equals 0.58%.

b. Cannot be calculated given the information.

c. Approximately equals 1.39%.

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