DA0-002 Data Analysis Practice Question
Which TWO of the following are components of time series data?
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
Trend and seasonality are classic components of time series. Mean, median, and variance are statistical measures but not components of time series decomposition.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Mean
Why it's wrong here
Mean is a summary statistic, not a time series component.
- ✗
Variance
Why it's wrong here
Variance is a dispersion measure, not a component.
- ✓
Trend
Why this is correct
Correct: Trend is a long-term direction.
- ✓
Seasonality
Why this is correct
Correct: Seasonality is a regular periodic pattern.
- ✗
Median
Why it's wrong here
Median is a central tendency measure, not a component.
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