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What is the volatility of a certain stock index from 2019 to 2022? The return for each year is given by: 4,30%, 10,75%, 2,05%, and

What is the volatility of a certain stock index from 2019 to 2022? The return for each year is given by: 4,30%, 10,75%, 2,05%, and 12,70%. Calculate the average return over the four-year period. Then, determine the volatility (standard deviation) of the stock index returns.


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