Ký hiệu tiện dùng β0 β1 u CHAP 1:Quiz 1 (7/6) ÍN 1. Which of the following is true of time series data? a. The time series data is easier to analyze than cross-sectional data. The time series data are independent across time.
The chronological ordering of observations in a time series conveys potentially important information. A time series data set consists of observations on a variable or several variables at a given time. A time series data is also called a longitudinal data set. True False → longitudinal data is panel data 3.
Which of the following is an example of time series data? a. Data on the unemployment rates in different parts of a country during a year. Data on the consumption of wheat by 200 households during a year. Data on the gross domestic product of a country over a period of 10 years.
Data on the number of vacancies in various departments of an organization on a particular month. Which of the following refers to panel data? a. Data on the unemployment rate in a country over a 5-year period b. Data on the birth rate, death rate and population growth rate in developing countries over a 10-year period.
Data on the income of 5 members of a family on a particular year. Data on the price of a company's share during a year. Which of the following is true of experimental data? a. Experimental data are collected in laboratory environments in the natural sciences.
Experimental data cannot be collected in a controlled environment. Experimental data is sometimes called observational data. Experimental data is sometimes called retrospective data. The parameters (ex: β0, β1) of an econometric model _____.
include all unobserved factors affecting the variable being studied b. describe the strength of the relationship between the variable under study and the factors affecting it c. refer to the explanatory variables included in the model d. refer to the predictions that can be made using the model 7.
Which of the following is true? Select one: a. A variable has a causal effect on another variable if both variables increase or decrease simultaneously. The notion of ‘ceteris paribus' plays an important role in causal analysis.: 1 variable change will affect on other variables, x change→ y change( with condition: other factors are constant) c. Difficulty in inferring causality disappears when studying data at fairly high levels of aggregation.
The problem of inferring causality arises if experimental data is used for analysis. An empirical analysis relies on _____ to test a theory. customs and conventions 9. A cross-sectional data set consists of observations on a variable or several variables over time.-> CORRECT at a time True False 10.
Which of the following is a difference between panel and pooled cross-sectional data? 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. 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 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.
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. The term ‘u' in an econometric model is usually referred to as the _____. The constants of econometric models are referred to as _____. Which of the following is the first step in empirical economic analysis? a.
Collection of data b. Statement of hypotheses c. Specification of an econometric model/ economic model d. Testing of hypotheses 4.
Econometrics is the branch of economics that _____. A study the behavior of individual economic agents in making economic decisions b. develops and uses statistical methods for estimating economic relationships c. d eals with the performance, structure, behavior, and decision-making of an economy as a whole d.
applies mathematical methods to represent economic theories and solve economic problems 5. The parameters of an econometric model _____. include all unobserved factors affecting the variable being studied b. describe the strength of the relationship between the variable under study and the factors affecting it c.
refer to the explanatory variables included in the model d. refer to the predictions that can be made using the model 6. An empirical analysis relies on _____ to test a theory. Customs and conventions 7.
A cross-sectional data set consists of observations on a variable or several variables over time.--> at a same time FALSE 9. The notion of ceteris paribus means "other factors being equal."= other variables are constant Note HL part 3 TRUE 10. Which of the following is a difference between panel and pooled cross-sectional data? 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.
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 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. 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. _____ has a causal effect on _____.
Income; consumption Đúng d. The term ‘u' in an econometric model is usually referred to as the _____. error term Đúng b.Data on the income of law graduates collected at different times during the same year is _____. panel data: tu 2 lan quan sat tro len, co the gom 2- tren 3 cross-sectional data (ko bi gioi han nhu pooled data) b.
time series data : 1 model trong nhiu nam d. cross-sectional data: Nhiu data trong 1 nam 4.Random sampling complicates the analysis of cross-sectional data.Experimental data are easy to obtain in the social sciences. → NON- Experimental data - True - False 6.Which of the following is an example of time series data? a. Data on the unemployment rates in different parts of a country during a year.
Data on the consumption of wheat by 200 households during a year. Data on the gross domestic product of a country over a period of 10 years. Data on the number of vacancies in various departments of an organization on a particular month. Which of the following terms measures the association between two variables? a.
Which of the following is a difference between panel and pooled cross-sectional data? 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. 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 Đúng 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.
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. A data set that consists of observations on a variable or several variables over time is called a _____ data set. time series Đúng d. The constants of econometric models are referred to as _____.
An economic model consists of mathematical equations that describe various relationships between economic variables True False ECONOMIC model: Them Beta de coi =cai đó nó thay đổi thì những cái khác ntn 1. Experimental data are sometimes called retrospective data. → A retrospective study uses existing data that have been recorded for reasons other than research False CHAP 2: Quiz 2 (14/6) ÍN 1. Which of the following is assumed for establishing the unbiasedness of Ordinary Least Square (OLS) estimates? a.
The error term has an expected value of 1 given any value of the explanatory variable. The regression equation is linear in the explained and explanatory variables. The sample outcomes on the explanatory variable are all the same value. The error term has the same variance given any value of the explanatory variable.
A dependent variable is also known as a(n) _____. The variance of the slope estimator increases as the error variance decreases. 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)? a. If xi and yi are positively correlated in the sample then the estimated slope is _____.
less than zero b. greater than zero c. equal to zero d. equal to one 6.
In a regression equation, changing the units of measurement of only the independent variable does not affect the _____. What is the estimated value of the slope parameter when the regression equation, passes through the origin? (đi qua tọa độ 0) 8. What does the equation denote if the regression equation is ? a. The explained sum of squares b.
The total sum of squares c. The sample regression function d. The population regression function 9. If a change in variable x causes a change in variable y, variable x is called the _____ a.
Which of the following is a nonlinear regression model? GỜ 1. In the regression of y on x, the error term exhibits heteroskedasticity if _____. it has a constant variance b. Var(y|x) is a function of x c.
x is a function of y d. y is a function of x 3. Simple regression is an analysis of correlation between two variables. In the equation y = B0 + B1*x + u, B0 is the _____.
In the equation c = B0 + B1*i + u , c denotes consumption and i denotes income. What is the residual for the 5th observation if c5 =$500 and c 5 hat =$475? A. There are n-1 degrees of freedom in Ordinary Least Square residuals. What is the estimated value of the slope parameter when the regression equation, y = alpha0 + Beta1*x1 + u passes through the origin? A.
Which of the following is a nonlinear regression model? 10. In the equation y = B0 + B1*x + u, what is the estimated value of B0? NHƯ 1.There are n-1 degrees of freedom in Ordinary Least Square residuals. In the equation y= Beta_0 + Beta_1*x+ u , what is the estimated value of Beta_0? The estimated value of β0 is ́y−^β1 ́x a. The sample covariance between the regressors and the Ordinary Least Square (OLS) residuals is always positive.
→ is zero True False 4. What is the estimated value of the slope parameter when the regression equation, y =alpha_0 + Beta_1*x + u passes through the origin? a. The sample correlation between xi and yi is denoted by _____. Consider the following regression model: y = B0 + B1x1 + u.
Which of the following is a property of Ordinary Least Square (OLS) estimates of this model and their associated statistics? a.