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The returns on a large portfolio of stocks and bonds are approximately normal and have a mean annual return of 8.3%.The standard deviationof returns is
The returns on a large portfolio of stocks and bonds are approximately normal and have a mean annual return of 8.3%.The standard deviationof returns is 19.7%.What is the upper value of 95% confidence interval on the average return over the next 10 years?
the answer should be in % rounded to 1 place "5.2" for 5.2%.
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