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Question : calculate the mean and standard deviation of


calculate the mean and standard deviation of the portfolio. The proportions invested in each stock are shown.
a. Chevron (CVX): 25%, du Pont (DD): 25%, Procter & Gamble (PG): 25%, Travelers (TRV): 25%
b. CVX: 50%, DD: 20%, PG: 15%, TRV: 15%
c. CVX: 10%, DD: 20%, PG: 30%, TRV: 40%
d. Explain why the choice of which portfolio to invest in is obvious.

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