You Try to Explain the Number of IBM Shares Traded

question 31

Multiple Choice

You try to explain the number of IBM shares traded in the stock market per day in 2005. As an independent variable you choose the closing price of the share. This is an example of

• A)simultaneous causality.
• B)invalid inference due to a small sample size.
• C)sample selection bias since you should analyze more than one stock.
• D)a situation where homoskedasticity-only standard errors should be used since you only analyze one company.

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Definitions:

Nissl Bodies

Structures found in nerve cells, involved in protein synthesis and recognized by their dark staining with basic dyes.

Ependymal Cells

Glial cells lining the ventricles in the brain and the central canal of the spinal column, involved in producing cerebrospinal fluid.

Neuroglial Cell

Non-neuronal cell in the nervous system that supports, protects, and nourishes neurons; also known as glial cell.

Cuboidal Shape

Describes cells that are roughly cube-shaped, with a width approximately equal to their height.