Suppose that Apple decides to release a scaled-down, less expensive I-phone to developing economies. The company is unsure if this venture will be successful or not, and the success of the project will impact shareholder return. What is the standard deviation of this venture?

\begin{tabular}{|l|l|l|l|} \hline OUTCOME & Stock Return & Probability & Difference squared \\ \hline Success & 0.25 & 0.7 & \\ \hline Failure & -0.3 & 0.3 & \\ \hline & & & \\ \hline & & & \\ \hline & & & \\ \hline & Varpected return & & \\ \hline Standard deviation & & & \\ \hline \end{tabular}