DA0-002 Data Analysis Practice Question
Which measure best describes the spread of the middle 50% of a dataset?
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
✓
IQR
Interquartile range (IQR) is the range between Q1 and Q3, covering the middle 50%.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
IQR
Why this is correct
IQR is robust and covers middle 50%.
- ✗
Range
Why it's wrong here
Range is max-min, sensitive to outliers.
- ✗
Standard deviation
Why it's wrong here
Standard deviation uses all data.
- ✗
Variance
Why it's wrong here
Variance uses all data points.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DA0-002 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DA0-002 exam.