The standard deviation measures:

A Central tendency

B The average distance of data points from the mean (spread/dispersion)

C The maximum value

D The median

✓ Correct Answer: Option B

SD = √(Σ(xi−x̄)²/n). Higher SD = more spread. For normal distributions, 68% of data within 1 SD of mean.

💡 Why is B) the correct answer?

The correct answer to the question "The standard deviation measures:" is Option B: The average distance of data points from the mean (spread/dispersion).

The other options — A) Central tendency, C) The maximum value, D) The median — are incorrect for this PCAT Exam Prep question. As explained above: SD = √(Σ(xi−x̄)²/n). Higher SD = more spread. For normal distributions, 68% of data within 1 SD of mean.

📚 About This PCAT Exam Prep Practice Question

This 1-level PCAT Exam Prep question from the Quantitative Reasoning 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 PCAT Exam Prep practice test or use flashcards for spaced repetition review.

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The standard deviation measures:

✓ Correct Answer: Option B

📚 About This PCAT Exam Prep Practice Question

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