EXST 2201: Exam 3 – Examining Statistical
Theories and Practices
In chapter 09, what characteristics of columns of data values is being measured - correct answer ✔✔The
movement between two columns of data values
What is needed to measure the movement between two columns of data values - correct answer
✔✔Two columns of dependent data values
Are two columns of both the height and weight of individuals appropriate to measure movement -
correct answer ✔✔Yes, because both height and weight come from one individual
Select the two important points to remember when interpreting statistics of mevement. - correct answer
✔✔(50%) Always look at the data first
(50%) Movement is not causation
Where does a lurking variable lurk - correct answer ✔✔Outside of the data values lurk
Why is a lurking variable important - correct answer ✔✔Because it affects the statistical results without
our knowledge
What is movement between two columns of data values? - correct answer ✔✔How the value of one
variable moves in relation to the values of the other variable
Select all choices that are the statistical methods used to measure variable relationships - correct answer
✔✔(33.33%) A scatterplot
(33.33%)Linear correlation
(33.33%) Linear regression
, What type of relationship between two variables can a scatterplot detect - correct answer ✔✔Any type
of relationship
Please match each variable with where it is plotted in a scatterplot - correct answer ✔✔Plotted on the x-
axis =The predictor variable
Plotted on the y-axis = The response variable
In the thought concept of variable relationship, please match each variable with when it changes. -
correct answer ✔✔Changes before the responses variable changes = The predictor variable
Changes after the predictor variable changes = The response variable
What type of relationship between two variables can linear correlation detect. - correct answer ✔✔Only
a linear relationship
Can linear correlation measure a linear relationship, as well as jut detect it? - correct answer ✔✔Yes, it
can measure both the direction and the strength of the linear relationship.
What is the range of values for linear correlation measure - correct answer ✔✔-1 to +1, inclusive ([-1,
+1]).
What information does linear regression give that linear correlation does not give? - correct answer
✔✔The magnitude of the effect of the linear relationship.
Conceptually, how is the information about a linear relationship summarized in linear regression. -
correct answer ✔✔By the line of best fit though the middle of the scatterplot
What statistical method will this book use to calculate the equation of the line in linear regression -
correct answer ✔✔The least-square method of linear regression
Theories and Practices
In chapter 09, what characteristics of columns of data values is being measured - correct answer ✔✔The
movement between two columns of data values
What is needed to measure the movement between two columns of data values - correct answer
✔✔Two columns of dependent data values
Are two columns of both the height and weight of individuals appropriate to measure movement -
correct answer ✔✔Yes, because both height and weight come from one individual
Select the two important points to remember when interpreting statistics of mevement. - correct answer
✔✔(50%) Always look at the data first
(50%) Movement is not causation
Where does a lurking variable lurk - correct answer ✔✔Outside of the data values lurk
Why is a lurking variable important - correct answer ✔✔Because it affects the statistical results without
our knowledge
What is movement between two columns of data values? - correct answer ✔✔How the value of one
variable moves in relation to the values of the other variable
Select all choices that are the statistical methods used to measure variable relationships - correct answer
✔✔(33.33%) A scatterplot
(33.33%)Linear correlation
(33.33%) Linear regression
, What type of relationship between two variables can a scatterplot detect - correct answer ✔✔Any type
of relationship
Please match each variable with where it is plotted in a scatterplot - correct answer ✔✔Plotted on the x-
axis =The predictor variable
Plotted on the y-axis = The response variable
In the thought concept of variable relationship, please match each variable with when it changes. -
correct answer ✔✔Changes before the responses variable changes = The predictor variable
Changes after the predictor variable changes = The response variable
What type of relationship between two variables can linear correlation detect. - correct answer ✔✔Only
a linear relationship
Can linear correlation measure a linear relationship, as well as jut detect it? - correct answer ✔✔Yes, it
can measure both the direction and the strength of the linear relationship.
What is the range of values for linear correlation measure - correct answer ✔✔-1 to +1, inclusive ([-1,
+1]).
What information does linear regression give that linear correlation does not give? - correct answer
✔✔The magnitude of the effect of the linear relationship.
Conceptually, how is the information about a linear relationship summarized in linear regression. -
correct answer ✔✔By the line of best fit though the middle of the scatterplot
What statistical method will this book use to calculate the equation of the line in linear regression -
correct answer ✔✔The least-square method of linear regression
