DA0-002 Data Analysis Practice Question
A dataset contains a variable 'Income' with many missing values. The analyst decides to impute missing values with the median income of the non-missing values. Which type of imputation is this?
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
✓
Median imputation
Replacing missing values with the median is a form of mean/median/mode imputation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Interpolation
Why it's wrong here
Interpolation estimates based on surrounding values.
- ✗
Deletion
Why it's wrong here
Deletion removes rows, not imputation.
- ✓
Median imputation
Why this is correct
Correct term.
- ✗
Forward-fill imputation
Why it's wrong here
Forward-fill uses previous value in sequence.
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