DA0-002 Data Analysis Practice Question
A dataset contains a column 'Age' with values: [22, 25, 25, 30, 35, 40, 45]. What is the interquartile range (IQR)?
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
✓
15
Q1 is median of lower half (22,25,25) = 25; Q3 is median of upper half (35,40,45) = 40; IQR = 40-25 = 15.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
15
Why this is correct
Correct IQR = Q3 - Q1 = 40 - 25 = 15.
- ✗
10
Why it's wrong here
Incorrect calculation.
- ✗
20
Why it's wrong here
Incorrect calculation.
- ✗
25
Why it's wrong here
Incorrect calculation.
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