Question: We have observed the following annual return data on large company stocks (S&P500 index) for the past five years: Annual Year Return 2017 21.83%

We have observed the following annual return data on large company stocks

We have observed the following annual return data on large company stocks (S&P500 index) for the past five years: Annual Year Return 2017 21.83% 2018 -4.38% 31.49% 18.40% 28.71% 2019 2020 2021 Calculate the average return and standard deviation of stock returns for the 2017-2021 sample period.

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