WGU C207 Data Driven Decision Making
Module 3 Exam (Answered)
The relationship between several independent variables and one dependent
variable is shown using __________.
a logistic regression
b simple linear regression
c multiple linear regression
d nonlinear regression
c multiple linear regression
Company A sells its 12,000th unit of the year. With that sale, the company's
revenue and cost curves meet. What is this point called?
a revenue point
b crossover point
c cost point
d breakeven point
d breakeven point
Cluster analysis
a) determines the variables that should be measured.
b) is used to determine the difference in the variable data points.
c) determines groups of terms or values based on different classification models.
d) groups terms or values based on the process of arranging different points in
the datas
c) determines groups of terms or values based on different classification models.
A classification model is just another way to say cluster or group. It is not possible to do
any type of analysis without determining beforehand the variables that are being
measured. Cluster analysis does measure the difference in the data points, but it is
used to group those points. One does not arrange or change, the different points in a
dataset.
If you want to test a change to a process or system before implementing it in real
time, which tool might you use to emulate it?
a regression
b simulation
c system
d application
b simulation
When there are several distinct populations, __________ can be used to analyze
the difference between the various populations with respect to its summary
statistics.
a analysis of variance
b crossover analysis
, c simple linear regression
d multiple linear regression
a analysis of variance
To compare populations you would use analysis of variance or ANOVA.
A data point that is significantly distant from the observations in the dataset is
called which of the following?
a far point
b error point
c abnormal distribution
d outlier
d outlier
In a normal distribution, approximately what percentage of data points in a
dataset will be within one standard deviation of the mean?
a 50.4
b 68.3
c 95.4
d 99.7
b 68.3
The strongest relationship between variables is represented by which of the
following numbers?
a -0.99
b -0.22
c 0.16
d 0.74
a -0.99
The closer the correlation is to one or negative one, the stronger the relationship
between variables is.
A __________ linear relationship exists when the dependent variable increases as
the independent variable increases.
a strong
b weak
c positive
d negative
c positive
When both the dependent and independent variables rise, the relationship is said to be
positive. If both variables fell, the relationship would be negative.
Analysis of Variance (ANOVA) is used to measure the likelihood that a number of
samples will be normally distributed. T/F
F. ANOVA is used to measure if samples from different populations are equal.
Time series analysis cannot be applied if there are multiple independent
variables. T/F
Module 3 Exam (Answered)
The relationship between several independent variables and one dependent
variable is shown using __________.
a logistic regression
b simple linear regression
c multiple linear regression
d nonlinear regression
c multiple linear regression
Company A sells its 12,000th unit of the year. With that sale, the company's
revenue and cost curves meet. What is this point called?
a revenue point
b crossover point
c cost point
d breakeven point
d breakeven point
Cluster analysis
a) determines the variables that should be measured.
b) is used to determine the difference in the variable data points.
c) determines groups of terms or values based on different classification models.
d) groups terms or values based on the process of arranging different points in
the datas
c) determines groups of terms or values based on different classification models.
A classification model is just another way to say cluster or group. It is not possible to do
any type of analysis without determining beforehand the variables that are being
measured. Cluster analysis does measure the difference in the data points, but it is
used to group those points. One does not arrange or change, the different points in a
dataset.
If you want to test a change to a process or system before implementing it in real
time, which tool might you use to emulate it?
a regression
b simulation
c system
d application
b simulation
When there are several distinct populations, __________ can be used to analyze
the difference between the various populations with respect to its summary
statistics.
a analysis of variance
b crossover analysis
, c simple linear regression
d multiple linear regression
a analysis of variance
To compare populations you would use analysis of variance or ANOVA.
A data point that is significantly distant from the observations in the dataset is
called which of the following?
a far point
b error point
c abnormal distribution
d outlier
d outlier
In a normal distribution, approximately what percentage of data points in a
dataset will be within one standard deviation of the mean?
a 50.4
b 68.3
c 95.4
d 99.7
b 68.3
The strongest relationship between variables is represented by which of the
following numbers?
a -0.99
b -0.22
c 0.16
d 0.74
a -0.99
The closer the correlation is to one or negative one, the stronger the relationship
between variables is.
A __________ linear relationship exists when the dependent variable increases as
the independent variable increases.
a strong
b weak
c positive
d negative
c positive
When both the dependent and independent variables rise, the relationship is said to be
positive. If both variables fell, the relationship would be negative.
Analysis of Variance (ANOVA) is used to measure the likelihood that a number of
samples will be normally distributed. T/F
F. ANOVA is used to measure if samples from different populations are equal.
Time series analysis cannot be applied if there are multiple independent
variables. T/F
