DA0-002 Data Analysis Practice Question
After a marketing campaign, sales increased by 15%. The analyst wants to understand which customer segment contributed most to the increase. Which type of analysis is this?
⚠ Common exam trap
Many candidates confuse diagnostic analysis with descriptive analysis, as both deal with past data, but descriptive only summarizes what happened while diagnostic explains why it happened.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Diagnostic analysis
Diagnostic analysis is used to understand the root cause of an event or change. In this scenario, the analyst already knows sales increased by 15% and wants to determine which customer segment drove that increase, which is a classic diagnostic question. This type of analysis goes beyond describing what happened to explain why it happened.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Predictive analysis
Why it's wrong here
Predictive analysis forecasts future outcomes, not explains past ones.
- ✓
Diagnostic analysis
Why this is correct
Diagnostic analysis investigates the cause of the outcome—here, which segment drove the increase.
- ✗
Prescriptive analysis
Why it's wrong here
Prescriptive analysis recommends actions based on predictions.
- ✗
Descriptive analysis
Why it's wrong here
Descriptive analysis would simply report the increase, not explain which segment contributed.
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