What Does It Meant to Say That a Study Is

question 109

Multiple Choice

What does it meant to say that a study is "double-blind"?

• A)Each patient receives both the drug being tested and a placebo,so that the effects of the drug can be compared to the effects of the patient's expectations.
• B)While the patient is aware to what treatment he or she is receiving,his or her family,friends,and therapist are not.
• C)Both the patient being given the drug and whoever will evaluate the drug's effects do not know whether the patient was given the treatment or the placebo.
• D)Two conditions are used,a treatment and a placebo.

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Definitions:

Historical Returns

The past performance of an investment, typically calculated as the percentage change in its value over a specific period of time.

Adjusted Beta

A measure that adjusts a stock's historical beta, or volatility in relation to the market, to reflect both the company's current fundamentals and the tendency of a beta to move towards the market average over time.

Covariance

A measure of how two variables change together, which can indicate the degree to which they move in the same or opposite directions.