Question: The average annual return for NASDAQ from 1920 to 2019 is 30%, with a standard deviation of 10%. Based on these numbers, what is a

The average annual return for NASDAQ from 1920 to 2019 is

The average annual return for NASDAQ from 1920 to 2019 is 30%, with a standard deviation of 10%. Based on these numbers, what is a 95% confidence interval for 2020's returns? 10%, 50% 10%, 30% O -10%, 10% O -15%, 15%

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