Suppose that your estimates of the possible one-year returns from investing in the common stock of the A. A. Eye-Eye Corporation were as follows: Probability of occurrence 0.1 0.2 0.4 0.2 0.1 Possible return -10% 5% 20% 35% 50% a. What are the expected return and standard deviation? b. Assume that the parameters that you just determined [under Part (a)] pertain to a normal probability distribution. What is the probability that return will be zero or less? Less than 10 percent? More than 40 percent? (Assume a normal distribution.)

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.