Final answer:
The question on determining the expected return of Stock A and standard deviation of Stock M cannot be answered without additional information about the stocks' returns or their probability distribution. Theoretical and sample calculations for both measures require specific data which is not provided in the question.
Step-by-step explanation:
The question involves determining the expected return of Stock A and the standard deviation of Stock M. Without additional information on the stocks' returns, one cannot definitively identify the correct choices from the provided options. Typically, to calculate expected return, one would average the possible returns weighted by their probabilities. Meanwhile, the standard deviation is a measure of the variability of returns, which requires calculating the square root of the variance (the average of the squared deviations from the mean).
It's important to distinguish between theoretical and sample means and standard deviations. The theoretical mean is what we would expect over an infinite number of observations, while the sample mean is the average obtained from a specific set of data. Similarly, the theoretical standard deviation is a measure of spread based on a probability distribution, and the sample standard deviation is calculated from actual data.
Unfortunately, the question does not provide enough data to perform the necessary calculations for either the expected return or the standard deviation. Without actual returns or a defined distribution of returns for Stock A and stock M, it's not possible to select the answer closest to the expected return and standard deviation.