The answer is a bar chart comparing churn rates for different support call counts. This is correct because a bar chart excels as the best visualization for comparing churn rates across discrete, categorical bins—such as 0, 1, 2, 3, and 4+ support calls—allowing stakeholders to instantly see the sharp increase in churn for customers with more than three calls. On the CompTIA Data+ DA0-001 exam, this question tests your ability to match a visualization type to a specific analytical insight, often with a trap of choosing a line chart (which implies a continuous trend, not categorical comparison) or a pie chart (which shows parts of a whole, not rate comparisons). Remember the memory tip: “Bars for bins, lines for trends”—when your data is grouped into distinct categories like call counts, a bar chart is your go-to for clear, direct comparison.
DA0-001 Communicating Data Insights Practice Question
This DA0-001 practice question tests your understanding of communicating data insights. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 data analyst needs to present findings about customer churn to business stakeholders. The analysis identified that churn is highest among customers who have called customer support more than three times in the last month. Which of the following is the best way to communicate this insight?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A bar chart comparing churn rates for different support call counts.
Option C is correct because a bar chart directly compares churn rates across discrete categories of support call counts (e.g., 0, 1, 2, 3, 4+ calls), making it easy for stakeholders to see the spike at 'more than three calls'. This aligns with the insight that churn is highest among customers with >3 support calls, and a bar chart is the standard visualization for comparing a continuous metric (churn rate) across categorical bins.
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.
✗
A scatter plot to show the relationship between support calls and churn.
Why it's wrong here
A scatter plot is better for continuous variables; here the independent variable is categorical.
✗
A pie chart showing the proportion of churned vs. retained customers.
Why it's wrong here
A pie chart shows overall proportions, not the relationship with support calls.
✓
A bar chart comparing churn rates for different support call counts.
Why this is correct
A bar chart effectively shows the relationship between a categorical variable (call count bins) and churn rate.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
A table of raw churn data by customer ID.
Why it's wrong here
Raw data tables are overwhelming and do not highlight the pattern.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may choose a scatter plot (Option A) because they think it shows 'relationship', but they fail to recognize that a scatter plot is inappropriate for a binary dependent variable and discrete independent variable, whereas a bar chart is the correct choice for comparing rates across categories.
Trap categories for this question
Command / output trap
A pie chart shows overall proportions, not the relationship with support calls.
Detailed technical explanation
How to think about this question
In data visualization best practices, a bar chart with grouped or stacked bars is ideal for comparing a binary outcome (churn) across ordinal categories (call count bins). The analyst should bin the 'number of support calls' into ranges (e.g., 0, 1-2, 3, 4+) and compute the churn rate per bin, then plot those rates as bars. This approach leverages the principle of pre-attentive processing—length comparisons are quickly understood—and avoids the overplotting issue of scatter plots with binary data. In a real-world scenario, stakeholders often need to identify a threshold (e.g., '3 calls') to trigger a retention campaign, and a bar chart makes that threshold visually obvious.
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.
TExam Day Tips
→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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Communicating Data Insights — This question tests Communicating Data Insights — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A bar chart comparing churn rates for different support call counts. — Option C is correct because a bar chart directly compares churn rates across discrete categories of support call counts (e.g., 0, 1, 2, 3, 4+ calls), making it easy for stakeholders to see the spike at 'more than three calls'. This aligns with the insight that churn is highest among customers with >3 support calls, and a bar chart is the standard visualization for comparing a continuous metric (churn rate) across categorical bins.
What should I do if I get this DA0-001 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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