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Assume that stock market returns do not resemble a single-index structure.An investment fund analyzes 125 stocks in order to construct a mean-variance efficient portfolio constrained by 125 investments.They will need to calculate _____________ expected returns and ___________ variances of returns.
Standard Deviation
A statistic that measures the dispersion or variability within a dataset, indicating how much individual data points deviate from the mean of the data.
External Validity
The extent to which the results of a study can be generalized or applied to situations outside the original experimental setting.
Representative
Someone or something that serves as a typical example or is characteristic of a group, class, or set.
Demand Characteristics
Aspects of an experimental setting that lead participants to guess the purpose of the study and adjust their behavior to what they think the experiment demands.
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