Simpson's paradox occurs when:

A A trend appears in several groups of data but reverses when groups are combined

B The mean equals the median

C Data is normally distributed

D Outliers are removed

✓ Correct Answer: Option A

Simpson's paradox is when a trend seen in subgroups reverses or disappears when the groups are combined, often due to a lurking variable.

💡 Why is A) the correct answer?

The correct answer to the question "Simpson's paradox occurs when:" is Option A: A trend appears in several groups of data but reverses when groups are combined.

The other options — B) The mean equals the median, C) Data is normally distributed, D) Outliers are removed — are incorrect for this GMAT Exam Prep question. As explained above: Simpson's paradox is when a trend seen in subgroups reverses or disappears when the groups are combined, often due to a lurking variable.

📚 About This GMAT Exam Prep Practice Question

This 3-level GMAT Exam Prep question from the Data Insights topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free GMAT Exam Prep practice test or use flashcards for spaced repetition review.

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Simpson's paradox occurs when:

✓ Correct Answer: Option A

📚 About This GMAT Exam Prep Practice Question

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