DA0-002 Data Analysis Practice Question
A time series of monthly sales data exhibits a clear upward trend over several years, with consistent peaks each December. Which components are present in this series?
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
✓
Trend and seasonality
The upward trend is a trend component, and the consistent December peaks indicate seasonality.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Trend and seasonality
Why this is correct
Correct identification.
- ✗
Cyclical and irregular components only
Why it's wrong here
Upward trend and December peaks are not cyclical or irregular.
- ✗
Seasonality and cyclical components only
Why it's wrong here
Cyclical patterns are longer-term and not fixed; the upward trend is also present.
- ✗
Trend and irregular components only
Why it's wrong here
Irregular components are random; December peaks are seasonal.
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