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Quiz

1/10
A data scientist is building an inferential model with a single predictor variable. A scatter plot of the
independent variable against the real-number dependent variable shows a strong relationship
between them. The predictor variable is normally distributed with very few outliers. Which of the
following algorithms is the best fit for this model, given the data scientist wants the model to be
easily interpreted?
Select the answer
1 correct answer
A.
A logistic regression
B.
An exponential regression
C.
A linear regression
D.
A probit regression

Quiz

2/10
SIMULATION
A client has gathered weather data on which regions have high temperatures. The client would like a
visualization to gain a better understanding of the data.
INSTRUCTIONS
Part 1
Review the charts provided and use the drop-down menu to select the most appropriate way to
standardize the data.
Part 2
Answer the questions to determine how to create one data set.
Part 3
Select the most appropriate visualization based on the data set that represents what the client is
looking for.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All
button.
Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 1-124138263


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Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 6-1314195653


Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 7-1646858842


Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 8-1804112528


Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 9-1749045716


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Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 12-26523030


Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 13-1693440128


Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 14-1287392748


Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 15-1960933661


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Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 17-3886210074
Select the answer
1 correct answer
Part 1
Select Table 2. Table 2 contains mixed temperature scales (°F and °C) that must be standardized
before visualization.
Variable: Temperature/scale
Action: Correct
Value to correct: 50 °C
Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 18-1407465708

Part 2
Method: Data matching
Join variable: Zip code
You need to merge the two tables by aligning matching records, which is a data-matching (join)
operation, and ZIP code is the shared, uniquely identifying field linking each region's weather
reading to its city.
Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 19-2903838518

Part 3
Choose the choropleth map (the first option).
A choropleth map best shows geographic variation in temperature by coloring each state (or region)
according to its recorded value. This lets the client immediately see where the highest and lowest
temperatures occur across the U.S. without distracting elements like bubble size or combined chart
axes.
Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 20-1798367063

Quiz

3/10
SIMULATION
A data scientist needs to determine whether product sales are impacted by other contributing
factors. The client has provided the data scientist with sales and other variables in the data set.
The data scientist decides to test potential models that include other information.
INSTRUCTIONS
Part 1
Use the information provided in the table to select the appropriate regression model.
Part 2
Review the summary output and variable table to determine which variable is statistically significant.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All
button.
Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 21-3558686006


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Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 27-2077172717
Select the answer
1 correct answer
Part 1
Linear regression.
Of the four models, linear regression has the highest R² (0.8), indicating it explains the greatest
proportion of variance in sales.
Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 28-1709086779

Part 2
Var 4 - Net operations cost.
Net operations cost has a p-value of essentially 0 (far below 0.05), indicating it is the only additional
predictor statistically significant in explaining sales. Neither inventory cost (p≈0.90) nor initial
investment (p≈0.23) reach significance.
Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 29-3412322441

Quiz

4/10
A data scientist wants to evaluate the performance of various nonlinear models. Which of the
following is best suited for this task?
Select the answer
1 correct answer
A.
AIC
B.
Chi-squared test
C.
MCC
D.
ANOVA

Quiz

5/10
Which of the following is the layer that is responsible for the depth in deep learning?
Select the answer
1 correct answer
A.
Convolution
B.
Dropout
C.
Pooling
D.
Hidden

Quiz

6/10
Which of the following modeling tools is appropriate for solving a scheduling problem?
Select the answer
1 correct answer
A.
One-armed bandit
B.
Constrained optimization
C.
Decision tree
D.
Gradient descent

Quiz

7/10
Which of the following environmental changes is most likely to resolve a memory constraint error
when running a complex model using distributed computing?
Select the answer
1 correct answer
A.
Converting an on-premises deployment to a containerized deployment
B.
Migrating to a cloud deployment
C.
Moving model processing to an edge deployment
D.
Adding nodes to a cluster deployment

Quiz

8/10
A data analyst wants to save a newly analyzed data set to a local storage option. The data set must
meet the following requirements:
Be minimal in size
Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 30-2290680350


Have the ability to be ingested quickly

Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 31-2290680350



Have the associated schema, including data types, stored with it

Certification Exam DY0-001: CompTIA DataX Certification CompTIA CompTIA-DY0-001 32-113502422

Which of the following file types is the best to use?
Select the answer
1 correct answer
A.
JSON
B.
Parquet
C.
XML
D.
CSV

Quiz

9/10
Which of the following is a key difference between KNN and k-means machine-learning techniques?
Select the answer
1 correct answer
A.
KNN operates exclusively on continuous data, while k-means can work with both continuous and categorical data.
B.
KNN performs better with longitudinal data sets, while k-means performs better with survey data sets.
C.
KNN is used for finding centroids, while k-means is used for finding nearest neighbors.
D.
KNN is used for classification, while k-means is used for clustering.

Quiz

10/10
A data scientist needs to:
Build a predictive model that gives the likelihood that a car will get a flat tire.
Provide a data set of cars that had flat tires and cars that did not.
All the cars in the data set had sensors taking weekly measurements of tire pressure similar to the
sensors that will be installed in the cars consumers drive. Which of the following is the most
immediate data concern?
Select the answer
1 correct answer
A.
Granularity misalignment
B.
Multivariate outliers
C.
Insufficient domain expertise
D.
Lagged observations
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  • Quiz name:DY0-001: CompTIA DataX Certification
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