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 - answer-c multiple linear regression
Company A sells its 12,000th unit of the y...
WGU C207 Data Driven Decision Making Module
3
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 - answer-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 - answer-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 -
answer-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 - answer-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 - answer-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 - answer-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 - answer-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 - answer-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 - answer-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 - answer-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 -
answer-F. Time series analysis can be used with multiple independent variables as long as one
of the independent variables represents time.
The four types of data patterns that are looked at are trends, cyclicalities, seasonalities, and
irregularities. T/F - answer-T. The four data patterns that are looked at during assessments are
trends, cyclicalities, seasonalities, and irregularities.
Multiple linear regression is an analysis of how multiple independent variables affect one
dependent variable. T/F - answer-T
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