Universidad Icesi Departamento de Economía

Econometría jcalonso@icesi.edu.co Sem01-2011 Quiz # 5 Chapter 9 Suggested Answers Group 3 Econometrics 06216

Name_____________________________

 Choose the most correct answer  You have 5 minutes to solve out this quiz

1. According to the text, when the underlying disturbances in the DGP are normally distributed, the F-

statistic will follow the F-distribution with r degrees of freedom in the numerator and:

a. n-k-1 in the denominator

b. n-1 in the denominator

c. n-k in the denominator

d. None of the above.

2. The F-test applies to null hypothesis that impose:

a. Nonlinear constrains on the coefficients of the regression model

b. Linear constraints on the coefficients of the regression model

c. Logarithmic constrains on the coefficients of the regression model

d. Cubic constrains on the coefficients of the regression model

3. When the coefficients of a regression relationship change over time, we call that:

a. Regime shift

b. Time series analysis

c. Time Shift

d. None of the above

4. Econometricians should avoid drawing firm conclusions from studies that examine a wide array of

variables and serve up a few “statistically significant” coefficients as discovery. This is:

a. Instrumental Variables

b. Fishing Expeditions

c. Data mining

d. b. and c.

e. None of the above

5. A Wald statistics is:

a. A statistics that count discrepancies form each constraint of the null hypothesis

b. A statistics that weights discrepancies of the estimates from their hypothesized values in accord with

the precisions of the estimators.

c. a. and b.

d. None of the above.