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7、The correct answer is  C

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To test the quality of an observation, a researcher would use a X = 0 or 1 variable that indicates whether a condition exists or not. One name for this type of variable is a dummy variable.

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8、A researcher has a sample of data concerning experienced investors for a given year. In the data is the number of years of experience of each investor and the number of option contracts each traded. This data would best be described as:

A) cross-sectional data.

B) deterministic data.

C) time series data.

D) specified data.

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7、Another name for a qualitative variable is:

A) panel variable.

B) longitudinal variable.

C) dummy variable.

D) deterministic variable.

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6、  The correct answer is C

 

Both types of data are used in econometric models.

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6、With respect to publicly available and privately purchased data, in estimating an econometric model, a researcher can use:

A) neither publicly available nor privately purchased data.

B) privately purchased but not publicly available data.

C) both publicly available and privately purchased data.

D) publicly available but not privately purchased data.

[此贴子已经被作者于2009-6-24 14:46:09编辑过]

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5、A dummy variable would best be used to measure the effect of which of the following?

1. The difference in implied volatility from one day to the next.
2. The difference in realized volatility from one day to the next.
3. The volatility of a stock on Mondays compared to that of other days.
4. Changes in a stock’s volatility on option expiration dates compared to other dates.

A) II and III only.

B) I and III only.

C) III and IV only.

D) I and II only.

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5、  The correct answer is  C

 

Changes attributable to a particular condition or day should be tested using a dummy variable.

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4、In the expression representing the results of a sample regression procedure Y_i = b₀ + b₁ × X_i +e_i, which of the following is the most correct statement?

A) The value of “b1” represents the expected change in the independent variable given a unit change in the dependent variable.

B) The value of “b0” represents the expected change in the dependent variable given a unit change in the independent variable.

C) The value of “b1” represents the expected change in the dependent variable given a unit change in the independent variable.

D) The value of “b0” represents the expected change in the independent variable given a unit change in the dependent variable.

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4、  The correct answer is C

 

In the equation, b₁ represents the slope coefficient, which indicates how the dependent variable moves in response to changes to the independent variable.

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3、  The correct answer is A

 

A regression model generally does not determine the dependent variable exactly, i.e., it is not deterministic. One reason for this is that the researcher cannot include all the necessary independent variables in the model.