QBA TEST PAPER 2025/2026 QUESTIONS AND SOLUTION
RATED A+
✔✔Which of the following relationships would have a negative correlation coefficient?
a. Cost of a car and the amount of tax to be paid
b. The square footage of a home and the price of the home
c. Supply and demand
d. Amount of a bill at a restaurant and the amount of the tip - ✔✔c. Supply and demand
✔✔_____ is a statistical procedure used to develop an equation showing how two
variables are related. - ✔✔c. Regression analysis
✔✔A regression analysis involving one independent variable and one dependent
variable is referred to as a _____. - ✔✔c. Simple linear regression
✔✔The population parameters that describe the y-intercept and slope of the line relating
y and x, respectively, are _____. - ✔✔a. B0 and B1
✔✔In a simple linear regression model, y = ß0 + ß1x + ε the parameter ß1 represents
the _____. - ✔✔d. slope of the true regression line
✔✔In the simple linear regression model, the _____ accounts for the variability in the
dependent variable that cannot be explained by the linear relationship between the
variables. - ✔✔c. error term
✔✔In a linear regression model, the variable that is being predicted or explained is
known as _____. It is denoted by y and is often referred to as the response variable. -
✔✔d. dependent variable
✔✔The graph of the simple linear regression equation is a(n) _____ - ✔✔b. straight line
✔✔In the graph of the simple linear regression equation, the parameter ß0 represents
the _____ of the true regression line. - ✔✔d. y-intercept
✔✔In the graph of the simple linear regression equation, the parameter ß1 is the _____
of the true regression line. - ✔✔b. slope
✔✔In a linear regression model, the variable (or variables) used for predicting or
explaining values of the response variable are known as the _____. It(they) is(are)
denoted by x. - ✔✔b. independent variable
, ✔✔In a simple linear regression analysis the quantity that gives the amount by which
the dependent variable changes for a unit change in the independent variable is called
the _____. - ✔✔c. slope of the regression line
✔✔A _____ is used to visualize sample data graphically and to draw preliminary
conclusions about the possible relationship between the variables. - ✔✔b. scatter chart
✔✔A procedure for using sample data to find the estimated regression equation is
_____. - ✔✔a. the least squares method
✔✔The _____ is a measure of the error that results from using the estimated regression
equation to predict the values of the dependent variable in the sample. - ✔✔b. sum of
squares due to error (SSE)
✔✔The coefficient of determination _____. - ✔✔c. is used to evaluate the goodness of
fit
✔✔What would be the coefficient of determination if the total sum of squares (SST) is
23.29 and the sum of squares due to regression (SSR) is 10.03? - ✔✔c. 0.43
✔✔Regression analysis involving one dependent variable and more than one
independent variable is known as _____. - ✔✔c. multiple regression
✔✔The process of making estimates and drawing conclusions about one or more
characteristics of a population through analysis of sample data drawn from the
population is known as _____. - ✔✔b. statistical inference
✔✔The process of making a conjecture about the value of a population parameter,
collecting sample data that can be used to assess this conjecture, measuring the
strength of the evidence against the conjecture that is provided by the sample, and
using these results to draw a conclusion about the conjecture is known as _____. -
✔✔b. hypothesis testing
✔✔_____ refers to the use of sample data to calculate a range of values that is believed
to include the value of the population parameter. - ✔✔b. Interval estimation
✔✔A normally distributed error term with a mean of zero would _____. - ✔✔b. allow
more accurate modeling
✔✔_____ refers to the degree of correlation among independent variables in a
regression model. - ✔✔c. Multicollinearity
RATED A+
✔✔Which of the following relationships would have a negative correlation coefficient?
a. Cost of a car and the amount of tax to be paid
b. The square footage of a home and the price of the home
c. Supply and demand
d. Amount of a bill at a restaurant and the amount of the tip - ✔✔c. Supply and demand
✔✔_____ is a statistical procedure used to develop an equation showing how two
variables are related. - ✔✔c. Regression analysis
✔✔A regression analysis involving one independent variable and one dependent
variable is referred to as a _____. - ✔✔c. Simple linear regression
✔✔The population parameters that describe the y-intercept and slope of the line relating
y and x, respectively, are _____. - ✔✔a. B0 and B1
✔✔In a simple linear regression model, y = ß0 + ß1x + ε the parameter ß1 represents
the _____. - ✔✔d. slope of the true regression line
✔✔In the simple linear regression model, the _____ accounts for the variability in the
dependent variable that cannot be explained by the linear relationship between the
variables. - ✔✔c. error term
✔✔In a linear regression model, the variable that is being predicted or explained is
known as _____. It is denoted by y and is often referred to as the response variable. -
✔✔d. dependent variable
✔✔The graph of the simple linear regression equation is a(n) _____ - ✔✔b. straight line
✔✔In the graph of the simple linear regression equation, the parameter ß0 represents
the _____ of the true regression line. - ✔✔d. y-intercept
✔✔In the graph of the simple linear regression equation, the parameter ß1 is the _____
of the true regression line. - ✔✔b. slope
✔✔In a linear regression model, the variable (or variables) used for predicting or
explaining values of the response variable are known as the _____. It(they) is(are)
denoted by x. - ✔✔b. independent variable
, ✔✔In a simple linear regression analysis the quantity that gives the amount by which
the dependent variable changes for a unit change in the independent variable is called
the _____. - ✔✔c. slope of the regression line
✔✔A _____ is used to visualize sample data graphically and to draw preliminary
conclusions about the possible relationship between the variables. - ✔✔b. scatter chart
✔✔A procedure for using sample data to find the estimated regression equation is
_____. - ✔✔a. the least squares method
✔✔The _____ is a measure of the error that results from using the estimated regression
equation to predict the values of the dependent variable in the sample. - ✔✔b. sum of
squares due to error (SSE)
✔✔The coefficient of determination _____. - ✔✔c. is used to evaluate the goodness of
fit
✔✔What would be the coefficient of determination if the total sum of squares (SST) is
23.29 and the sum of squares due to regression (SSR) is 10.03? - ✔✔c. 0.43
✔✔Regression analysis involving one dependent variable and more than one
independent variable is known as _____. - ✔✔c. multiple regression
✔✔The process of making estimates and drawing conclusions about one or more
characteristics of a population through analysis of sample data drawn from the
population is known as _____. - ✔✔b. statistical inference
✔✔The process of making a conjecture about the value of a population parameter,
collecting sample data that can be used to assess this conjecture, measuring the
strength of the evidence against the conjecture that is provided by the sample, and
using these results to draw a conclusion about the conjecture is known as _____. -
✔✔b. hypothesis testing
✔✔_____ refers to the use of sample data to calculate a range of values that is believed
to include the value of the population parameter. - ✔✔b. Interval estimation
✔✔A normally distributed error term with a mean of zero would _____. - ✔✔b. allow
more accurate modeling
✔✔_____ refers to the degree of correlation among independent variables in a
regression model. - ✔✔c. Multicollinearity
