A data analyst is examining a single column of numeric data representing customer ages. Which technique is most appropriate for summarizing the distribution of this single variable?

Creating a scatter plot of age against purchase amount

Computing the correlation coefficient between age and income

Calculating the mean, median, and standard deviation of the ages

Performing a principal component analysis on the age column

A data analyst is working with a time series dataset of daily website traffic over two years. They want to identify the overall trend and any seasonal patterns (e.g., weekly or yearly cycles). Which graphical approach is most appropriate for this initial EDA?

A line chart of traffic over time, with a rolling average overlaid to smooth short-term fluctuations

A pie chart of traffic by month

A histogram of daily traffic values

A scatter plot of traffic vs. day-of-week

CompTIADataX

Domain 2Objective 1

EDA Methods DY0-001 Practice Questions (Page 5)

Part of the Modeling, analysis, and outcomes domain, which accounts for 24% of the DY0-001 exam. CompTIA does not publish an official question count, but from its 165-minute exam (~65–110 total, ~16–26 in this domain), expect 3–5 from this objective — we provide 24 practice questions to prepare you well beyond it. (estimate)

24questions here

5free pages

5concepts

24%of the exam

Questions 21–24

21foundation · easy
A data analyst wants to display the distribution of a continuous variable and also identify any outliers. Which graph is most appropriate?
Select an answer first
22foundation · easy
Which chart type is most effective for comparing the proportion of total sales contributed by different product categories?
Select an answer first
23foundation · easy
A data analyst is examining a single column of numeric data representing customer ages. Which technique is most appropriate for summarizing the distribution of this single variable?
Select an answer first
24application · medium
A data analyst is working with a time series dataset of daily website traffic over two years. They want to identify the overall trend and any seasonal patterns (e.g., weekly or yearly cycles). Which graphical approach is most appropriate for this initial EDA?
Select an answer first

Finished these 4 questions?

Review the revealed explanations, or continue through the curriculum.

No more pagesBack to DY0-001

Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by CompTIA. “DY0-001” is a trademark of its owner, used for identification only.

EDA Methods DY0-001 Practice Questions (Page 5)

Questions 21–24

A data analyst wants to display the distribution of a continuous variable and also identify any outliers. Which graph is most appropriate?

Which chart type is most effective for comparing the proportion of total sales contributed by different product categories?

A data analyst is examining a single column of numeric data representing customer ages. Which technique is most appropriate for summarizing the distribution of this single variable?

A data analyst is working with a time series dataset of daily website traffic over two years. They want to identify the overall trend and any seasonal patterns (e.g., weekly or yearly cycles). Which graphical approach is most appropriate for this initial EDA?

Keep studying — Modeling, analysis, and outcomes