What Is the Covariance of Security a to the Market

question 47

Multiple Choice

What is the covariance of Security A to the market given the following information?
$$\begin{array} { c c c } \text { Year } & \text { Security A Returns } & \text { Market Returns } \\1 & 1\% & - 6\% \\2 & 9 & 14 \\3 & - 2 & 7 \\4 & 18 & 12\end{array}$$

• A)23.14
• B)29.88
• C)48.83
• D)99.18
• E)114.01

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Definitions:

Cell-mediated Immunity

The aspect of immunity that is mediated by specialized cells known as T lymphocytes for defending the body against viral infections and cancer.

Cytotoxic T Cells

A type of white blood cell that kills cancer cells, cells that are infected with viruses, or cells that are damaged in other ways.

T Lymphocyte

A type of white blood cell that plays a central role in the immune response by attacking foreign invaders and cancer cells.

Memory T Cells

A type of T cell that remains in the body after an initial infection and helps to quickly respond to the same antigen upon re-exposure.