1. A stock has an expected return of 15.7% and a standard deviation of 11.4%. What is the upper range of the 95% confidence interval for this stock? (Show your answer to the nearest three decimals.)
2. A stock has monthly returns of 28%, -4%, -1%, and 30%. What is the stock’s geometric average return? (nearest 4 decimals)
3. A stock had the following annual returns: 18%, 8%, -1%, and -12%. What is the stock's standard deviation? (Show your answer to four decimals.)