WGU D352 Section 1 exam 2024 With qustions and correct answers(Aactual Exam 100%)

WGU D352 Section 1
exam 2024 With
qustions and correct
answers(Aactual Exam
100%)
The relationship between two variables that are both quantitative can
be displayed in a __________________________. - ✔✔✔✔-scatterplot;
The affected variable is called the _______________ variable*. - ✔✔✔✔-
When one variable causes change in another, we call the first variable
the explanatory variable*.
The affected variable is called the response variable*.
In a randomized experiment, the researcher manipulates values of the
explanatory variable and measures the resulting changes in the
response variable. The different values of the explanatory variable are
called treatments. An experimental unit is a single object or individual
to be measured.
A two-way table, also known as a two-way frequency table or
contingency table, is used to show the relationship between two
______________________variables ( C→C ); the rows show the categories of
one variable, and the columns show the categories of the other
variable. - ✔✔✔✔-categorical variables ( C→C )
______________________. These represent the total number of instances
that fall in both the corresponding row and header.
The data in the green cells show _______________________________. These
are equal to the sum of the number of individuals in the corresponding
row or column. - ✔✔✔✔-The cells in yellow show joint frequencies*.
These represent the total number of instances that fall in both the
corresponding row and header.
When one variable causes change in another, we call the first variable
the ___________________ variable*.
For example, data in the "Male" row and "With Autism" column counts
the number of males with autism.
The data in the green cells show marginal frequencies*. These are
equal to the sum of the number of individuals in the corresponding row
or column. For example, data in the "Totals" column and "Female" row
shows the total number of females in the study. It may be helpful to
remember that marginal frequencies appear in the margins of the
table.
The bottom, right cell (in both the "Totals" column and the "Totals"
row) measures the total number of individuals in the study.
As we've seen earlier, every point on a coordinate plane can be
represented by an ordered pair*, ( x , y ). Here, the x -value is typically
the _________________variable's value for a piece of data, and the y -value
is the corresponding value for the ________________________variable. A
simple way to remember this fact is that the term "explanatory" has
an " x " in it. - ✔✔✔✔-explanatory variable; response variable
Side-by-side box plots are a good choice for two-variable data where
the explanatory variable is ____________ data and the response variable
is ____________ data. - ✔✔✔✔-Categorical
Quantitative
Which variable, explanatory or response, is displayed on the x -axis on
side-by-side boxplots? - ✔✔✔✔-Side-by-side boxplots can be horizontal
or vertical, so either variable (explanatory or response) can be
displayed on the x -axis.
A scatterplot is a good choice to display two-variable data that are
both __________ variables. - ✔✔✔✔-Quantitative
The relationship between the x -variable and the y -variable is called
_____________. - ✔✔✔✔-Correlation
What determines the location of a dot on a scatterplot? - ✔✔✔✔-A dot
is placed on a scatterplot according to its
x - and y -value.
When analyzing a possible relationship for two-variable data, if both
variables are categorical, what is the most appropriate choice to
display the data?
a) Side-by-side boxplots
b) Scatterplot
c) Bar chart
d) Two-way frequency table
e) Histogram - ✔✔✔✔-Answer: D
A two-way frequency table is the most appropriate way to graphically
display a possible relationship for two-variable data, when both
variables are categorical.
A hospital hires an independent consulting firm to perform a study
about patients with high blood pressure, and the medicine they are
being prescribed. The study is examining the relationship between a
patient's starting blood pressure when they entered the treatment
program and the dosage of blood pressure medicine they are
prescribed during their treatment. For this study:
What is the explanatory variable? Is the explanatory variable
categorical or quantitative?