Question: (Expected return and risk) The following data represent returns for the common stocks over a one-year period. Probability Returns Google ATT 0.1 -20% -10% 0.2

(Expected return and risk) The following data represent returns for the common stocks over a one-year period.

Probability Returns
Google ATT
0.1 -20% -10%
0.2 8% 4%
0.2 16% 30%
0.3 -18% 20%
0.2 4% -6%

The standard deviation of Google return is _%. (Keep the sign and two decimal numbers.)

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