Quiz about PHƯƠNG PHÁP NGHIÊN CỨU

Question 1

Econometrics is the branch of economics that _____.

Accepted Answer

b. develops and uses statistical methods for estimating economic relationships

Answer

a. studies the behavior of individual economic agents in making economic decisions

Answer

c. deals with the performance, structure, behavior, and decision-making of an economy as a whole

Answer

d. applies mathematical methods to represent economic theories and solve economic problems.

Question 2

Nonexperimental data is called _____.

Accepted Answer

c. observational data

Answer

a. cross-sectional data

Answer

b. time series data

Answer

d. panel data

Question 3

Which of the following is true of experimental data?

Accepted Answer

a. Experimental data are collected in laboratory environments in the natural sciences.

Answer

b. Experimental data cannot be collected in a controlled environment.

Answer

c. Experimental data is sometimes called observational data.

Answer

d. Experimental data is sometimes called retrospective data.

Question 4

An empirical analysis relies on _____to test a theory.

Accepted Answer

c. data

Answer

a. common sense

Answer

b. ethical considerations

Answer

d. customs and conventions

Question 5

The parameters of an econometric model _____.

Accepted Answer

b. describe the strength of the relationship between the variable under study and the factors affecting it

Answer

a. include all unobserved factors affecting the variable being studied

Answer

c. refer to the explanatory variables included in the model

Answer

d. refer to the predictions that can be made using the model

Question 6

Which of the following is the first step in empirical economic analysis?

Accepted Answer

c. Specification of an econometric model

Answer

a. Collection of data

Answer

b. Statement of hypotheses

Answer

d. Testing of hypotheses

Question 7

A data set that consists of a sample of individuals, households, firms, cities, states, countries, or a variety of other units, taken at a given point in time, is called a(n) _____.

Accepted Answer

a. cross-sectional data set

Answer

b. longitudinal data set

Answer

c. time series data set

Answer

d. experimental data set

Question 8

Data on the income of law graduates collected at different times during the same year is_____.

Accepted Answer

d. cross-sectional data

Answer

a. panel data

Answer

b. experimental data

Answer

c. time series data

Question 9

A data set that consists of observations on a variable or several variables over time is called a _____ data set.

Accepted Answer

c. time series

Answer

a. binary

Answer

b. cross-sectional

Answer

d. experimental

Question 10

Which of the following is an example of time series data?

Accepted Answer

c. Data on the gross domestic product of a country over a period of 10 years.

Answer

a. Data on the unemployment rates in different parts of a country during a year.

Answer

b. Data on the consumption of wheat by 200 households during a year.

Answer

d. Data on the number of vacancies in various departments of an organization on a particular month.

Question 11

Which of the following is a difference between panel and pooled cross-sectional data?

Accepted Answer

b. A panel data set consists of data on the same cross-sectional units over a given period of time while a pooled data set consists of data on different cross-sectional units over a given period of time

Answer

a. A panel data set consists of data on different cross-sectional units over a given period of time while a pooled data set consists of data on the same cross-sectional units over a given period of time.

Answer

c. A panel data consists of data on a single variable measured at a given point in time while a pooled data set consists of data on the same cross-sectional units over a given period of time.

Answer

d. A panel data set consists of data on a single variable measured at a given point in time while a pooled data set consists of data on more than one variable at a given point in time.

Question 12

_____ has a causal effect on _____.

Accepted Answer

c. Income; consumption

Answer

a. Income; unemployment

Answer

b. Height; health

Answer

d. Age; wage

Question 13

Experimental data are sometimes called retrospective data.

Accepted Answer

b. False

Answer

a. True

Question 14

An economic model consists of mathematical equations that describe various relationships between economic variables.

Accepted Answer

a. True

Answer

b. False

Question 15

A cross-sectional data set consists of observations on a variable or several variables over time.

Accepted Answer

b. False

Answer

a. True

Question 16

A time series data is also called a longitudinal data set.

Accepted Answer

b. False

Answer

a. True

Question 17

A dependent variable is also known as a(n) _____.

Accepted Answer

d. response variable

Answer

a. explanatory variable

Answer

b. control variable

Answer

c. predictor variable

Question 18

If a change in variable x causes a change in variable y, variable x is called the _____.

Accepted Answer

c. explanatory variable

Answer

a. dependent variable

Answer

b. explained variable

Answer

d. response variable

Question 19

If the total sum of squares (SST) in a regression equation is 81, and the residual sum of squares (SSR) is 25, what is the explained sum of squares (SSE)?

Accepted Answer

b. 56

Answer

a. 64

Answer

c. 32

Answer

d. 18

Question 20

If the residual sum of squares (SSR) in a regression analysis is 66 and the total sum of squares (SST) is equal to 90, what is the value of the coefficient of determination?

Accepted Answer

c. 0.27

Answer

a. 0.73

Answer

b. 0.55

Answer

d. 1.2

Question 21

Which of the following is assumed for establishing 
the unbiasedness of Ordinary Least Square (OLS) estimates?

Accepted Answer

The error term has the same variance given any value of the explanatory variable

Answer

a. The error term has an expected value of 1 given any value of the explanatory variable

Answer

b.The regression equation is linear in the explained and explanatory variables.

Answer

The sample outcomes on the explanatory variable are all the same value.

Question 22

The error term in a regression equation is said to exhibit homoskedasticty if ______________

Accepted Answer

b. it has the same variance for all values of the explanatory variable.

Answer

a. it has zero conditional mean

Answer

it has the same value for all values of the explanatory variable

Answer

if the error term has a value of one given any value of the explanatory variable

Question 23

In the regression of y on x, the error term exhibits heteroskedasticity if _______________.

Accepted Answer

b.Var(y|x) is a function of x

Answer

a. it has a constant variance

Answer

x is a function of y

Answer

y is a function of x

Question 24

A natural measure of the association between two random variables is the correlation coefficient

Accepted Answer

a. True

Answer

b. False

Question 25

The sample covariance between the regressors and the Ordinary Least Square (OLS) residuals is always positive.

Accepted Answer

b. False

Answer

a. True

Question 26

R-squared is the ratio of the explained variation compared to the total variation

Accepted Answer

a. True

Answer

b. False

Question 27

There are n-1 degrees of freedom in Ordinary Least Square residuals.

Accepted Answer

a. True

Answer

b. False

Question 28

The variance of the slope estimator increases as the error variance decreases.

Accepted Answer

b. False

Answer

a. True

Question 29

If the explained sum of squares is 35 and the total sum of squares is 49, what is the residual sum of squares?

Accepted Answer

d. 14

Answer

a. 10

Answer

b. 12

Answer

c. 18

Question 30

The value of R2 always _____.?

Accepted Answer

c. lies between 0 and 1

Answer

a. lies below 0

Answer

b. lies above 1

Answer

d. lies between 1 and 1.5

Question 31

If an independent variable in a multiple linear regression model is an exact linear combination of other independent variables, the model suffers from the problem of_____________?

Accepted Answer

a. perfect collinearity

Answer

b. homoskedasticity

Answer

c. heteroskedasticty

Answer

d. omitted variable bias

Question 32

The assumption that there are no exact linear relationships among the
independent variables in a multiple linear regression model fails if _____, where n is
the sample size and k is the number of parameters

Accepted Answer

d. n<k+1

Answer

a. n>2

Answer

b. n=k+1

Answer

c. n>k

Question 33

8. Exclusion of a relevant variable from a multiple linear regression model leads to the problem of _____

Accepted Answer

a. misspecification of the model

Answer

b. multicollinearity

Answer

c. perfect collinearity

Answer

d. homoskedasticity

Question 34

High (but not perfect) correlation between two or more independent variables is
called _____

Accepted Answer

c. multicollinearity

Answer

a. heteroskedasticty

Answer

b. homoskedasticty

Answer

d. micronumerosity

Question 35

The term _____ refers to the problem of small sample size

Accepted Answer

a. micronumerosity

Answer

b. multicollinearity

Answer

c. homoskedasticity

Answer

d. heteroskedasticity

Question 36

Find the degrees of freedom in a regression model that has 10 observations and
7 independent variables.

Accepted Answer

b. 2

Answer

a. 17

Answer

c. 3

Answer

d. 4

Question 37

The Gauss-Markov theorem will not hold if _________.

Accepted Answer

c. the independent variables have exact linear relationships among them

Answer

a. the error term has the same variance given any values of the explanatory variables

Answer

b. the error term has an expected value of zero given any values of the independent variables

Answer

d. the regression model relies on the method of random sampling for collection of data

Question 38

The key assumption for the general multiple regression model is that all factors
in the unobserved error term be correlated with the explanatory variables.

Accepted Answer

b. False

Answer

a. True

Question 39

The coefficient of determination (R2) decreases when an independent variable is
added to a multiple regression model.

Accepted Answer

b. False

Answer

a. True

Question 40

An explanatory variable is said to be exogenous if it is correlated with the error term.

Accepted Answer

b. False

Answer

a. True

Question 41

A larger error variance makes it difficult to estimate the partial effect of any of the independent variables on the dependent variable.

Accepted Answer

a. True

Answer

b. False

PHƯƠNG PHÁP NGHIÊN CỨU

60 questions

Econometrics is the branch of economics that _____.

Nonexperimental data is called _____.

Which of the following is true of experimental data?

An empirical analysis relies on _____to test a theory.

The term ‘u’ in an econometric model is usually referred to as the _____.

The parameters of an econometric model _____.

Which of the following is the first step in empirical economic analysis?

A data set that consists of a sample of individuals, households, firms, cities, states, countries, or a variety of other units, taken at a given point in time, is called a(n) _____.

Data on the income of law graduates collected at different times during the same year is_____.

A data set that consists of observations on a variable or several variables over time is called a _____ data set.

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