This DA0-001 practice question tests your understanding of visualizing data. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A retail company has collected data on monthly advertising spend (in thousands of dollars) and corresponding sales (in thousands of dollars) over the past 12 months. The analyst creates a scatter plot to visualize the relationship between advertising spend and sales. The plot shows a cluster of points with a positive trend, but there is one extreme outlier where spend was $100,000 but sales were only $20,000. Upon investigation, the analyst discovers that the outlier is due to a data entry error: the sales figure should have been $200,000. The analyst wants to present the overall trend accurately in a meeting. Which course of action should the analyst take first?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Remove the outlier and recreate the scatter plot.
Option A is correct. Since the outlier is confirmed to be a data entry error, it should be removed or corrected before creating a new scatter plot. Option B is incorrect: a line chart would not be appropriate because the data is not a time series (it's just ordered pairs, not sequential over time). Option C is incorrect: adding a trend line to the current plot would still be influenced by the erroneous outlier. Option D is incorrect: creating bins would hide the outlier but not address the data quality issue, and it may obscure the relationship.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use a bar chart to show average sales per advertising spend bin.
Why it's wrong here
Incorrect. Binning may hide the outlier but does not fix the data error, and bar charts are less effective for showing correlation.
✗
Add a trend line using linear regression to the current scatter plot.
Why it's wrong here
Incorrect. The trend line would be heavily skewed by the outlier, giving a misleading representation.
✓
Remove the outlier and recreate the scatter plot.
Why this is correct
Correct. Removing the erroneous data point ensures the scatter plot reflects the true relationship.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Change the chart type to a line chart.
Why it's wrong here
Incorrect. A line chart implies a time sequence, but the data is not time-ordered; it pairs spend with sales arbitrarily.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
Incorrect. Binning may hide the outlier but does not fix the data error, and bar charts are less effective for showing correlation.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the DA0-001 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which DA0-001 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Visualizing Data — This question tests Visualizing Data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Remove the outlier and recreate the scatter plot. — Option A is correct. Since the outlier is confirmed to be a data entry error, it should be removed or corrected before creating a new scatter plot. Option B is incorrect: a line chart would not be appropriate because the data is not a time series (it's just ordered pairs, not sequential over time). Option C is incorrect: adding a trend line to the current plot would still be influenced by the erroneous outlier. Option D is incorrect: creating bins would hide the outlier but not address the data quality issue, and it may obscure the relationship.
What should I do if I get this DA0-001 question wrong?
Identify which DA0-001 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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